Author page: Jim Wappes

Several new studies on the Pfizer/BioNTech mRNA COVID-19 vaccine describe good effectiveness against the Delta (B1617.2) variant after a booster dose and high but waning protection against infection and severe illness 6 months after the second dose. Other, much smaller, studies demonstrated…

Face coverings offer modest source control for COVID-19, study finds Cloth or surgical facial masks reduced SARS-CoV-2 RNA 77% in exhaled coarse aerosol particles and 48% in exhaled fine aerosol particles, offering "modest" source control, according to a Clinical Infectious Diseases study…