Covid was a collective trauma. I was based in Berlin then and still remember the day Angela Merkel, Germany’s chancellor at the time, announced the lockdown. The rest is history: Home-schooling, masks, PCR tests, apocalyptically empty airports, the stories of friends’ parents passing away alone in hospitals and care homes. It was hard. Which is why recent reports of two other virus outbreaks — hantavirus and Ebola — are so triggering. Is this the next Covid, a friend asked me. It isn’t. But my colleague Apoorva Mandavilli, a science and…