Comrade Aqua Rium. I would like to somewhat cool your ardor by the example of the same water. He worked as an auxiliary worker in the church and personally brought water in order to be consecrated. He asked: "Where to get it?" The answer is: "Either pour from the column, or go to the source." The column is understandably ordinary tap water, although it flows through pipes that are open to all winds and have not been replaced for at least 40 years. But in those days she did not work, which means that it was necessary to go to the source. With him, everything is more fun than with the column - at that time it was a piece of pipe, completely rotten more than once, clothes of algae and mucus hung from it. All this flowed into a concrete ring dug into the ground ... which was used instead of a bath by homeless people. Maybe it was a local legend, but there were always bars of soap. There is no need to talk about the fact that leaves were floating there, but inside everything was overgrown with lush greenery. And yet - no one knows where this water comes from. Either a spring, or a water supply system, or somewhere else. It was this water that was taken for consecration. Do you think it was boiled? No, they only warmed up to 70-80 degrees, so that there was no steam, because it can harm the frescoes. By the way, in order to protect water from bacteria, at this temperature it must be kept for about 45 minutes - 1.5 hours, which of course was not done. So much for holy water. And it is also worth remembering the very procedure for the consecration of water: a cross in dirty hands (kissing, grabbing, grabbing objects) is carried by the priest, the cross is kissed and he rubs against clothes and a lot of fabrics, and then it is lowered into the water. A breeding ground for bacteria. Let me also remind you about the brush, which is sprinkled on the people - it is also not boiled. Oh, yes, about the icons and the rest that you wrote: the explanation is very simple - the incubation period. You can get infected in the church, but the disease will appear in 2 weeks. I'm not trying to question your belief in miracles, but I am sharing my experience and knowledge in the field of hygiene, albeit at the school level.
For pathogens of infectious diseases, there is no difference between religious artifacts and any other things.
As you understand, church dishes, icons, crosses and other religious attributes are no different from everyday objects around a person. All of them have a surface on which microorganisms appear and / or enter.
Attending a church is as safe as visiting any other public place: theaters, cinemas, subways and other places where people gather.
But as for kissing icons / crosses and communion from a common dish, this is an unsafe business. Objectively: none of us, coming to church, knows who touched all these subjects before us. And okay, disgust. But there are viral (for example, hepatitis A or some intestinal infections) and bacterial infections that can be transmitted in this way.