Tom Hanks explains to Stephen Colbert why he masks on the subway: "I'm doing a play right now so I cannot get sick... I've had COVID enough in my life, I don't need to do that again. So I'm wearing this for health reasons." Thank you Tom! Masks are a key part of public health.

Austrian researchers identify persistent immune protein as biomarker for complications of Long COVID-19. Researchers identified PTX-3 as a potential biomarker for lasting tissue damage, chronic immune activation, and post-infection complications, shedding light on Long COVID and ME/CFS biological mechanisms. Source: https://archive.li/WB5AE Study:

Frontiers | Severe COVID-19 induces prolonged elevation of the acute-phase protein pentraxin 3