Flu is largely suppressed in summer anyway, with outbreaks moving from the northern to southern hemisphere, in time for winter, and back again. So, it feels un

Flu is largely suppressed in summer anyway, with outbreaks moving from the northern to southern hemisphere, in time for winter, and back again. So, it feels unsurprising that flu is relatively easy to suppress, since its spread is already fragile in normal times. The combination of summer suppression and (continuing) hygiene measures has resulted in historic low levels of flu globally, which would need time to grow exponentially to even reach baseline levels.