From your website:
"Principles of Quarantine, Waste Disposal and Sterilization
When the Black Plague was killing much of Europe prior to the Renaissance, desperate nations turned to the church for guidance. Returning to the Old Testament Laws of Moses, they instituted principles practiced by the Israelites for dealing with diseases like leprosy, for handling of the dead. and for waste disposal. Quarantine is well understood today as a means of controlling infectious disease. In the days of Moses and in the days of the Black Plague, however, God's command (Leviticus 13) had to be obeyed without people knowing why. The entire chapter of Leviticus 13 discusses diseases and illness, and means of diagnosis and cure.
"The person with such an infectious disease must wear torn clothes, let his hair be unkempt, cover the lower part of his face and cry out, 'Unclean! Unclean!' As long as he has the infection he remains unclean. He must live alone; he must live outside the camp." This is what we have adapted even today:covering our mouths so as not to spread germs!
"If any clothing is contaminated with mildew--any woolen or linen clothing, ...The priest is to examine the mildew and isolate the affected article for seven days. ... On the seventh day he is to examine it, and if the mildew has spread in the clothing ...it is a destructive mildew; the article is unclean. He must burn up the clothing..."
Sound familiar ? Of course we now realize that clothes must destroyed in order to prevent the spreading of germs. But civilizations, centuries ago, followed the Bible practices without having a clue as to why they did so, other than seeing the results. Another biblical insight not understood until the late 1800's is the principle of sterilization ( washing of hand and clothing). Guidelines for washing are outlined in the handling of the dead (Numbers 19). Further information on these amazing Biblical insights can be read in Leviticus 15, Leviticus 12, 13. This further validates the scripture as the divine revelation of God to mankind."
In fact this contradicts what is known about the church and Black Death (bubonic plague). Christians at that time were notoriously dirty people. They did not bathe, they emptied their bed-pans into the street. They ate from communal plates. They often befouled any fresh running water with raw sewage so that most people drank wine as it was the only beverage safe to drink (although many did drink some form of well water).
Bubonic plague is transferred from rats to people by flea bites. People passed the plague amongst themselves by sneezing or coughing the infected sputnum in the air. Christianity did not stop the plague. The amazing revelations by the Bible have nothing to do with bubonic plague. The burial practices mentioned by your author did not even make a dent. If there were fleas around ( and there were sure to be some it was a part of life then), any one within jumping distance was doomed.
I am sure there's more contradictions but this one caught my eye.