I *think* I actually observed something of this once in a temple. Now as I say, I *think*, I don't know for a fact but on inference. But the pujari at the temple was very nice, did not act as if she was "guilty" or make her feel "uncomfortable", but did not offer all the services such as related to puja.
Now, normally there is a bath after the 4th day (sometimes 5th day), and then you can go to the puja. You have to also understand, there was a period of time in the past when taking a bath might have been difficult, so even I as a man would not go to puja without a bath before but in those days it might have been difficult for me to take a bath. Even today, cleanliness is sometimes a problem in some countries. I am going to Africa perhaps in August, and I will be passing through areas where there may be an issue of cleanliness, not only the conditions of others, but I am worried a bit for myself too. This is also a region where about 150 miles away there have been Ebola virus outbreaks, you can imagine how scary that is. In the past, cleanliness was also linked with disease, and obviously you can make a connection to that today even though there wasn't an understanding of bacteria verse virus and so on. Long in the past, there was access to clean rivers and such, but then by the middle ages a lot of things had changed.
Today I was just reading a story of a very serious issue in China of polluted water situation effecting drinking water now. It does not hurt to have a society that tries to emphasize keeping things clean, at all levels. When you live where there is small populations, that may be easier. When you live in an area of high population and crowded conditions, it starts to become more difficult and a premium. That is simply the way of the world, but even when we fail at it, we must still try to instill the idea of why cleanliness if good. In Holland culture for example, this was a strong ideation in the 1600's, and everyone was constantly washing and washing the tiled and brick patios, in the houses and so on. Probably it was "overboard" in one sense, but it did help mitigate some issues that were a serious issue in England (verse Holland).
By the way, a pujari will avoid doing puja if the pujari (priest) has cut notably a finger with blood flow. Such things are expected of the pujari, too.
I do think that events around an area create vibration in the air, or in the solid objects around. I do think there is something to the old song "good vibrations". If there is enough water, then we should all take advantage of bathing!
Om Namah Sivaya