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by numpad0 1998 days ago
Mortality is said to reduce because less severe virus keep the hosts more mobile and increase chances of transmission, outnumbering more severe variants.

For the COVID though, IIUC there’s 4-day asymptomatic phase where most of transmission occurs, followed by 2-week symptomatic phase, and it is thought to be unique. So it’s not clear if normal rules of thumbs apply to it.