Thread by @MarkDavidsonAfr

STUDY:
Published in the Morbidity and Mortality Weekly Report (MMWR ), the CDC's weekly journal.

Do masks help limit SARS-COV-2 transmission?

Answer: Yes they do.

A short 🧵

"Masking, along with fewer exposure encounters, helped significantly to cut the incidence of COVID-19 infection among largely unvaccinated US university students"

"Among nearly 400 close contacts of students who tested positive for SARS-CoV-2, the likelihood of a positive test result was more than five times higher in situations where at least one of the two individuals was unmasked versus situations where both were masked."

Adjusted odds ratio [aOR] 5.4, 95% CI 1.5-36.5, P=0.008.

Link: medicalbrief.co.za/masks-helped-l…