Raf Schepers

TL;DR: Perceived advantages of oral fluid for verifying METH exposure compared with urine include simpler specimen collection and reduced potential for adulteration, but urine offers higher analyte concentrations and a greater window of detection.

TL;DR: Oral fluid testing is a useful alternative matrix for monitoring codeine exposure with a detection window of 7-21 h for single doses, depending on cutoff concentrations, but because of high variability, oral fluid codeine concentrations did not reliably predict concurrent plasma concentrations.

TL;DR: In this paper , the authors employed a test-negative design on S-gene target failure data from community PCR testing in the Netherlands from 22 November 2021 to 31 March 2022 (n = 671,763).

TL;DR: The SARS-CoV-2 Omicron variant has a growth advantage over the Delta variant because of higher transmissibility, immune evasion or shorter serial interval, and within households, the mean serial interval for SGTF cases was 0.2–0.6 days shorter than for non-SGTF cases.

TL;DR: It is suggested that vaccine- or infection-induced immunity against SARS-CoV-2 infections is less effective against the Omicron than the Delta variant.