You can get some weird shit from preserved parasites and bacteria, if it's glacier runoff, it's filtered through miles and miles of biofilters and then probably hit again by chlorine and whatever whatever else is used by the water treatment plants.
Raw dogging a glacier is probably okay, but not for any extended period of time.
If I was an evil sentient virus that took over bodies my first step would be to use the first person I infect to do a start up and get celebrities to try my stuff, then at their next concert like 21 out of the 50 people that ordered tickets will get infected
Most things that can survive for a long time in glacier ice are going to have a hard time surviving in the 95 degrees F vat of acid known as your stomach
Y'all are just jealous you won't fall into a coma 36 hours after ingestion, slough off your skin and reform it into a scabrous shell, liquefy your body for metamorphosis, and emerge as Baron Annelidaeus the Thawed... Just let people enjoy things...