{"id":7907,"date":"2025-10-01T00:01:22","date_gmt":"2025-10-01T08:01:22","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=7907"},"modified":"2025-10-01T16:34:54","modified_gmt":"2025-10-02T00:34:54","slug":"usmle-step-2-ck-question-of-the-day-routine-vaccination","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination","title":{"rendered":"USMLE\u00ae Step 2 CK Question of the Day:\u00a0Routine vaccination"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">In This Article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#The_correct_answer_to_todays_USMLE%C2%AE_Step_2_Question_is%E2%80%A6\" >The correct answer to today\u2019s USMLE\u00ae Step 2 Question is\u2026<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#Incorrect_Answer_Explanations\" >Incorrect Answer Explanations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#Main_Explanation\" >Main Explanation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#Major_Takeaway\" >Major Takeaway<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#Want_to_learn_more_about_this_topic\" >Want to learn more about this topic?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-2-ck-question-of-the-day-routine-vaccination\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><em>Today, we\u2019re examining a clinical case of a 53-year-old man seeing his PCP for his annual visit. Based on his history, which vaccinations would you recommend?<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 53-year-old man presents to his primary care physician for his annual visit. Since his last visit one year ago, he has had no new concerns. He reports adequate sleep, nutrition, and exercise. He drinks alcohol socially but does not smoke or use other recreational substances. His last Tdap booster was six years ago. Past medical history is significant for hypertension for which he takes amlodipine. Vital signs are within normal limits. The patient is well-appearing and in no acute distress. Cardiopulmonary, abdominal, and musculoskeletal examinations are within normal limits. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Which of the following vaccinations is indicated <em>now<\/em>?\u00a0\u00a0<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Recombinant (Zoster) vaccine (RZV)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Tdap booster<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. RSV vaccine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. HPV vaccine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>E. Hepatitis A vaccine<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Scroll down for the correct answer!<\/em><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Osmosis.org at the University College London, UK\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/DIp3u0oTLo4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_correct_answer_to_todays_USMLE%C2%AE_Step_2_Question_is%E2%80%A6\"><\/span>The correct answer to today\u2019s USMLE\u00ae Step 2 Question is\u2026<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Recombinant (Zoster) vaccine (RZV)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Correct:<\/strong> See Main Explanation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_Answer_Explanations\"><\/span>Incorrect Answer Explanations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Tdap booster<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong> This patient has received a Tdap booster within the last ten years. It is unnecessary to have another vaccination for 4 more years unless he sustains a severe wound that is at high-risk for infection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. RSV vaccine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong> There is no specific recommendation regarding immunization against RSV infection for patients aged 50-60. For patients older than 60 years, immunization is recommended for immunocompromised patients and those with certain chronic diseases.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. HPV vaccine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong> The HPV vaccine is not recommended for adults greater than age 45.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>E. Hepatitis A vaccine<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong> The hepatitis A vaccine is not routinely indicated for patients 50 years and older unless they are unvaccinated and at increased risk for infection or at increased risk for severe disease from infection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Explanation\"><\/span>Main Explanation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"524\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/10\/image_513c89.png\" alt=\"Pictured: a man receiving a vaccine shot\n\n50-64 YEARS (Vaccinations)\nHepB < 60 complete series\n&gt;60 increased risk health conditions\n- Chronic liver disease\n- Illicit drug use\n- Increased-risk sexual behaviors\n- Incarcerations\n\nCovid-19\nInfluenza (annual)\nRZV all patients protect against Shingles.\nTdap or Td every 10 years\nRSV &gt;60, 1 does if:\n- Chronic lung disease\n- Kidney disorders\n- Diabetes mellitus\n- Cardiovascular disease\n- Severely compromised immune\n\" class=\"wp-image-7910\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/10\/image_513c89.png 975w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/10\/image_513c89.png?resize=300,161 300w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/10\/image_513c89.png?resize=768,413 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This patient, who is 53 years old with a past medical history significant for hypertension and without health concerns or other chronic conditions, presents for routine evaluation with his primary care physician. A core component of annual primary care evaluation is ensuring that patients are up-to-date on vaccinations. Based on this patients age, he is a candidate for the recombinant zoster vaccine (RZV) which is administered to help prevent shingles. Two doses of recombinant zoster vaccine (RZV) to prevent shingles and related complications is recommended for adults aged \u226550 years.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Immunizations, also known as <a href=\"https:\/\/www.osmosis.org\/blog\/a-quick-history-of-vaccines-from-smallpox-to-covid\">vaccines<\/a>, stimulate the immune system to produce antibodies against specific microorganisms. These antibodies disable pathogens and remain in the body to provide long-term immunity, decrease the likelihood of infection, and decrease its severity. The vaccination schedule for adults is determined by age and underlying immune status and can be divided into recommendations for four diverse groups based on age, 19-26yo, 27-49yo, 50-64yo, and patients aged 65 and older. Administration of vaccines should occur based on the recommendations for each age group and the compounding risk factors such as pregnancy or immunosuppression.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Major_Takeaway\"><\/span>Major Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Routine adult vaccination is based on age and associated risk factors. The recombinant zoster vaccine (RZV) is recommended for adults aged \u226550 years.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Want_to_learn_more_about_this_topic\"><\/span>Want to learn more about this topic?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Watch the Osmosis video:<\/strong> <a href=\"https:\/\/www.osmosis.org\/learn\/Herpes_zoster_infection_(shingles):_Clinical_sciences\">Herpes zoster infection (shingles): Clinical sciences<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>(2024). Recommended adult immunization schedule. ACIP.<br><a href=\"https:\/\/www.cdc.gov\/vaccines\/schedules\/downloads\/adult\/adult-combined-schedule.pdf\">https:\/\/www.cdc.gov\/vaccines\/schedules\/downloads\/adult\/adult-combined-schedule.pdf<\/a><\/li>\n\n\n\n<li>(2022). Adult Immunizations. AAFP.<br>Centers for Disease Control and Prevention. Adult Immunization Schedule by Age. CDC. Published November 16, 2023. <a href=\"https:\/\/www.cdc.gov\/vaccines\/schedules\/hcp\/imz\/adult.html\">https:\/\/www.cdc.gov\/vaccines\/schedules\/hcp\/imz\/adult.html<\/a><\/li>\n\n\n\n<li>Centers for Disease Control and Prevention. Adult Immunization Schedule by Medical Condition and Other Indication. CDC. Published November 16, 2023. <a href=\"https:\/\/www.cdc.gov\/vaccines\/schedules\/hcp\/imz\/adult-conditions.html\">https:\/\/www.cdc.gov\/vaccines\/schedules\/hcp\/imz\/adult-conditions.html<\/a>.<\/li>\n\n\n\n<li>Center for Disease Control and Prevention. Vaccine-Preventable Adult Diseases. CDC. Reviewed March 30, 2022. <a href=\"https:\/\/www.cdc.gov\/vaccines\/adults\/vpd.html.\">https:\/\/www.cdc.gov\/vaccines\/adults\/vpd.html.<\/a><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/www.osmosis.org\/plans\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2021\/01\/Blog_Display_Ads_GENERAL2_2023.png\" alt=\"\" class=\"wp-image-4405\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2021\/01\/Blog_Display_Ads_GENERAL2_2023.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2021\/01\/Blog_Display_Ads_GENERAL2_2023.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Want more USMLE\u00ae Step 2 CK practice questions? Try Osmosis from Elsevier today! Access your&nbsp;<em><a href=\"http:\/\/osmosis.org\/create\" target=\"_blank\" rel=\"noreferrer noopener\">free trial<\/a><\/em>&nbsp;and discover why millions of current and future clinicians and caregivers love learning with us.<\/strong><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apply vaccination guidelines for adults, including which vaccines are recommended based on age and health status during routine check-ups.<\/p>\n","protected":false},"author":204,"featured_media":7909,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[27,20,16,1366,1370,45],"tags":[1589,1590,1587,1586,1592,1591,1585,1588,671],"class_list":["post-7907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-medicine","category-exam-prep","category-do","category-questions","category-step-2-questions","category-step-2","tag-adult-vaccinations","tag-hepatitis-a-vaccine","tag-hpv-vaccine","tag-immunization-guidelines","tag-preventive-care","tag-rsv-vaccine","tag-shingles-vaccine","tag-tdap-booster","tag-usmle-step-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - 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He was hospitalized two weeks ago for pneumonia and now reports difficulty swallowing and regurgitation of undigested food particles.\u00a0 Can you figure out the diagnosis and which\u2026","rel":"","context":"In &quot;Allopathic Medicine (MD)&quot;","block_context":{"text":"Allopathic Medicine (MD)","link":"https:\/\/www.osmosis.org\/blog\/category\/medicine"},"img":{"alt_text":"","src":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/80.webp","width":350,"height":200,"srcset":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/80.webp 1x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/80.webp 1.5x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/80.webp 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/7907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/users\/204"}],"replies":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/comments?post=7907"}],"version-history":[{"count":3,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/7907\/revisions"}],"predecessor-version":[{"id":7912,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/7907\/revisions\/7912"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/media\/7909"}],"wp:attachment":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/media?parent=7907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/categories?post=7907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/tags?post=7907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}