If you look up the general topic, the listed ones are endemic strains — ie, the yearly ones. https://en.wikipedia.org/wiki/Influenza_pandemic https://en.wikipe

If you look up the general topic, the listed ones are endemic strains — ie, the yearly ones. https://en.wikipedia.org/wiki/Influenza_pandemic https://en.wikipedia.org/wiki/Influenza_pandemic Being surprised by asymptomatic cases suggests their IFR numbers are high on the page you linked, due to low occurrence and conflation with other colds (or asymptomatic cases). Is there anything to suggest that the asymptomatic strain detected here is worse?