Wearing a mask whole sick is the equivalent to coughing or sneezing into a tissue. Except with a mask it’s like keeping that contaminated tissue on your face for potentially hours.
If you have flu like symptoms, just stay home, simple. However, if you’re not feeling sick, not coughing/sneezing. There’s no need to stay home, social distance, or wear a mask. It’s complete bullshit, they’ve never did this with the seasonal flu and everyone was fine with that.