[Clemenza]

Because viruses are mutating. The increase in global mobility also causes the spread of staff and other maladies that were previously contained. I am not a medical expert, but this is what I know.

[macmedic892]

"Because viruses are mutating. The increase in global mobility also causes the spread of staff and other maladies that were previously contained."

Viruses and bacteria are constantly mutating, that's true. The main problem is that bacteria have been developing resistance to antibiotics, due in large part to over-prescribing of antibiotics and poor patient compliance with antibiotics. So, the next time you get antibiotics, FINISH THEM as directed.