How much COVID-19 you’re exposed to matters. Here’s how to reduce it.

How much COVID-19 you’re exposed to matters. Here’s how to reduce it.

Viral load alone won’t determine how sick people will get. Other factors like age, co-morbidities and genetics play an even bigger role, according to Ilhem Messaoudi, the director of the University of California, Irvine’s Center for Virus Research. “The host plays a much more important role in the trajectory of clinical disease,” .… “Masking can prevent up to 70% of transmission, that’s basically as good as one dose of the vaccine,” Messaoudi said.