I'm glad to see you posting again Tsing Tao. It seems like you took a break from this site. Again, I'm glad you alright. I happen to agree with everything that gwb-trading has posted on covid. Don't hate me bro! lol.....
There is science and studies behind the CDC's guidance to wear masks in face of the Delta variant. Here is the recent study on the Massachusetts breakout. Outbreak of SARS-CoV-2 Infections, Including COVID-19 Vaccine Breakthrough Infections, Associated with Large Public Gatherings — Barnstable County, Massachusetts, July 2021 https://www.cdc.gov/mmwr/volumes/70/wr/mm7031e2.htm
GXB doesn't understand the first thing about The Kung Flu. He/she could not pass a virology 101 course.