I know there was another thread about masks are effective this but it was negatively skewed by the op. This thread will at least start on a positive note. Masks work in conjunction with social distancing and good hygiene practices. This is absolutely proven last year when the flu and other childhood respiratory illnesses dropped by 62% in the United States. The only thing different was we were all wearing masks, or at least most of us anyway. Home Page Top Stories>2021/03/30 another site demonstrates 49 reasons why proper mask wearing is effective. KXAN Austin>coronavirus Also I heard on the news Tonite if you had the Delta variant it does NOT protect you from the Omicron variant. Which I found remarkable. ABC News.