One of the allegations is that one or more lab workers were sick with covid in 2019. Their colleagues - the scientific community - cannot through science alone

One of the allegations is that one or more lab workers were sick with covid in 2019. Their colleagues - the scientific community - cannot through science alone determine if this was true. If it happened then they went to a nearby hospital. To investigate there is possibly a police matter, certainly a health matter, a political matter and many things - but is not answered by waving the magic science wand. And so on. People who claim it’s a science question are shallow or deceitful.