Fungal infections are opportunistic infections.
People with weakened immune function, in particular, succumb to those.
So a virus that takes out your immune system puts you at risk for fungal infections.
In particular, anything that lowers your CD4 count...
Many don't remember the early days of that other virus, before it was controlled by anti-virals.
Right. But there are many viruses and other pathogens that weaken the immune system. Secondary infections are responsible for a lot of the deaths.