Screening guidelines are heavily tested on all the USMLE exams (especially 2CK/3). In this extremely HY podcast, I discuss all you need to know from a screening perspective for NBME exams. I categorize things in a way that makes remembrance extremely easy. You will get many questions right from this podcast on your exam.
EDIT: For lung cancer, it’s a 20 pack year history (not 30 pack years). And screening starts at 50 years, not 55. Apologies for the confusion.
divineinterventionpodcasts.com 
The USPSTF recommends annual screening for lung cancer with low-dose computed tomography (LDCT) in adults aged 50 to 80 years who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years.
(The podcast says ages 55-80 for this type of screening).
https://www.uspreventiveservicestaskforce.org/uspstf/recommendation-topics/uspstf-and-b-recommendations
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