Yes. As always, it's best to have a clear idea what you're trying to achieve before raising purchase orders here, there, and everywhere!
I assume that the idea is to detect (or, conversely, demonstrate the absence of) airborne bacteria. But, what about surface bacteria (much more likely, in my view) ... use swabs, and get them looked at in the lab. And, what about
viruses, which (to my mind) present the far bigger problem (and, I believe, are more likely to be spread through the air ... droplets, sneezing,
etc.).
If the "bugs" are about (and, to a certain extent, they certainly always
will be), they will soon make their presence felt regardless of whether the air was sampled "only yesterday"!
Assuming that good preventive measures are already in place (good hygiene, hand washing
etc.), I would suggest that, if money must be spent, fork out instead on corrective measures ... deep cleaning, fumigation and whatever else is available.
Once again, the old sayings ring true. This time it's
"Prevention is Better Than Cure"!
