"viruses don’t like the low humidity"
And there's the fact that, yes, a datacenter creates a lot of heat, but that heat is evacuated outside and server rooms are constantly cooled. The start of the article makes it sound like all the hot air is being ventilated around the building, carrying viruses with it.
Between the hot air being evacuated, the atmospheric control keeping humidity low and the constant cooling everywhere, I agree with the remark that a datacenter should be a pretty good place to work right now. Just keep that hand sanitizer ready and don't touch any doorknobs or door handles if you can avoid it.