system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't we ever seem to get sick from two things at once?

I guess what Im trying to say is, lets say I have the Flu....or a Cold or w/e bug/virus is going around.

How come in my weakened state that im not infected by a ton of other viruses. It "seems" like it'd make you MORE prone, but I dont think I or anyone i've known has ever gotten sick by more than one thing at a time. Is there any reason for this? Or is it just because our immune system is in overdrive mode?
gpt
Alot of bacterial infections, especially upper respiratory infections, are often preceded by a virus infection. 

The virus can disturb the local immunity in the mucosal membranes and make it easier for bacteria to colonize and start an infection. In these cases you´re maybe not always "sick" from two things at once, but you would be infected by two different pathogens at once. You could for example get a simple cold first (the virus) and about week later develop sinuitis (the bacteria).