US epidemiologist explains why vaccines alone won't stop Delta
https://www.youtube.com/watch?v=uezHgoEVI5Q
Why some experts recommend upgrading to N95 masks to help fight the delta variant
https://www.washingtonpost.com/lifestyle/wellness/n95-mask-delta-variant-kn95/2021/07/23/ee849e6c-eafe-11eb-97a0-a09d10181e36_story.html
“Cloth masks are INEFFECTIVE against COVID-19, says ex-Biden adviser and top epidemiologist who is urging Americans to wear N-95 masks instead if they have to”
https://www.dailymail.co.uk/news/article-9858577/Former-Biden-COVID-adviser-says-cloth-masks-ineffective-preferring-N95-mask.html