3 ms·

So what happened to Spanish Flu ?

• zzzeek 5y ago
  the flu is contagious once it has symptoms, which mean severe symptoms lead people to self-isolate naturally before it spreads, thus it survives better if its symptoms are less severe. covid has no such issue as it spreads well before it has any severity and for a few days before any symptoms. all the deadly stuff happens a week later once you've been transmitting for many days. the above link explains this well > So, unless SARS-CoV-2 becomes so virulent that it causes people to become severely ill and self-isolate before they transmit the virus to other people, there is no pressure on it to become less deadly.