I had giardia one time .. actually I still have it :(
I went to see the physician to treat it, a MD, at least I thought. The doc said he wanted to give me "ivermectin" to eliminate the infection(!!!). Ivermectin(!?!). is this a weird COVID quack? I don't see how a HORSE DEWORMER has any place in human medicine - I'd rather keep the giardia, thanks, then take some quack horse dewormer drug
The pathogenic bacteria can survive boiling: bad for us.
Infections seem rare: better.
Counterpoint anecdata: I had Giardia once, and that's a month I never want to repeat. Ever. (survives boiling; isn't super common)