Objective To estimate the effectiveness of mRNA covid-19 vaccines against symptomatic
infection and severe outcomes (hospital admission or death). Design Test negative design …

BACKGROUND & AIMS: There are limited data on mortality from colorectal cancer (CRC)
among patients who have received colonoscopy examinations. We sought to determine CRC …

Background Influenza vaccine effectiveness (VE) is generally interpreted in the context of
vaccine match/mismatch to circulating strains with evolutionary drift in the latter invoked to …

OBJECTIVES: A higher proportion of colorectal neoplasia among women occurs in the
proximal colon, which might be more frequently missed by colonoscopy. There are no data on …

Introduction Older adults are prioritized for influenza vaccination but also have lowered
antibody responses to the vaccine. Higher-doses of influenza antigen may increase immune …

The authors estimated plausible ranges of the probability of human papillomavirus (HPV)
transmission per coital act among newly forming couples by using stochastic computer …

BACKGROUND & AIMS: We evaluated the risk of cervical abnormalities in women with
inflammatory bowel disease (IBD) in a population-based, nested, case-control study. METHODS: …

The association between use of aspirin and other nonsteroidal anti‐inflammatory drugs (NSAIDs)
and the risk of prostate cancer remains controversial despite many observational …

Background. We estimate vaccine effectiveness (VE) against both influenza A/subtypes and
B/lineages in Canada for the 2011–2012 trivalent inactivated influenza vaccine (TIV) with …

Antibiotic use during infancy alters gut microbiota and immune development and is associated
with an increased risk of childhood asthma. The impact of prenatal antibiotic exposure is …