I don't know too many people, so can't really comment. Hopefully it just goes away over time. My theory (based on absolutely nothing), is that many people have it, but because it's flying HIV that attacks your immune system, they don't really know until they've caught the flu, which then becomes a life threatening illness. Maybe because everything is so clean as of late, no-one has had a chance to get sick. But that doesn't explain Wuhan, or the clouds of crows that are absolutely swarming the area.