Have people around you been falling sick recently?

I first starting getting suddenly sick after 3 years about end of August. I also realised my sibling and a couple of my family member also started getting sick, sick as in sore throat, flu or cough.

Then, last week and this week, my co workers and some of my friends just started get sick out of nowhere with similar symptoms. However, quick research by HealthHub and Gleneagles shows the flu season is at April to July, and November to January, though these is occurring between these seasons.

Anyone also getting the same sentiment here? Seems to just suddenly occur out of nowhere. Anyone have an explanation?