Reducing this quote mentioned elsewhere: > PF-07321332 is designed to block the activity of [a specific] enzyme that the coronavirus needs to replicate. Co-adm

Reducing this quote mentioned elsewhere: > PF-07321332 is designed to block the activity of [a specific] enzyme that the coronavirus needs to replicate. Co-administration with a low dose of ritonavir helps slow [the breakdown] of PF-07321332 in order for it to remain active in the body for longer periods of time at higher concentrations to help combat the virus. It's a two-part drug. PF-07321332 is the new and shiny thing that impairs a crucial enzyme for the virus, while the pre-existing drug ritonavir lets PF-07321332 last longer, making it more clinically useful. That's my take on it.