Putin could not tolerate a free, democratic, & prosperous Ukraine because then the Russians would want it. By showing weakness in our Ukraine policies, we encouraged Putin to invade it. John McCain got it

Respirator masks (tight fitting) lower risk of infection by 83%. Other masks are not as effective.

Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021

cdc.gov Weekly / February 11, 2022 / 71(6);212–216

https://www.cdc.gov/mmwr/volumes/71/wr/mm7106e1.htm

On February 4, 2022, this report was posted online as an MMWR Early Release.

Kristin L. Andrejko1,2,*; Jake M. Pry, PhD2,*; Jennifer F. Myers, MPH2; Nozomi Fukui2; Jennifer L. DeGuzman, MPH2; John Openshaw, MD2; James P. Watt, MD2; Joseph A. Lewnard, PhD1,3,4; Seema Jain, MD2; California COVID-19 Case-Control Study Team (View author affiliations)

“Consistent use of a face mask or respirator in indoor public settings was associated with lower odds of a positive SARS-CoV-2 test result (adjusted odds ratio = 0.44). Use of respirators with higher filtration capacity was associated with the most protection, compared with no mask use.”