The researchers found a strong positive correlation between severe COVID-19 (defined as a COVID-19 hospitalization) and chance of death for any reason. There'r

The researchers found a strong positive correlation between severe COVID-19 (defined as a COVID-19 hospitalization) and chance of death for any reason. There're obvious reasons why people of all ages with preexisting health issues are likely to get severe COVID-19 as opposed to asymptomatic, mild or moderate one, and the same people are also more likely to die from other health-related reasons. This would explain the correlation they found. However, in the "Discussion" section they wrote this: Based on the evidence that contracting severe COVID-19 infection increases the risk of death after surviving the episode, it is clear that prevention of significant COVID-19 infection is the most effective way to decrease the risk of death following COVID-19 Does anyone understands why exactly is it clear? Note the graph in the same article shows people with mild COVID-19 have lower risk of death compared to people with no COVID at all.