...Well my initial look-up was on funerals.org. They should know, one suspects... Bacteria and viruses that cause disease (as opposed to decomposers, which are a smell threat rather than a health threat) generally can't survive more than a few hours in a dead body (HIV may be a rare exception). When I come to put on my biologist hat and think about it, I'd say that most pathogens can thrive only at or near body temperature, and death shuts off that avenue of opportunity for them. And as, at least in the west, there's generally an interval of several days or weeks between death and the funeral, a funeral of a corona virus victim, sad though it would be, need not accumulate any further concerns. In m'humble, of course...