My theory on immunization in general and Covid-19

I have a THEORETICAL opinion worth exactly the amount you are paying for it that those who are vaccinated against other diseases have a better defense against this virus due to a stronger developed immune system that will at least mitigate the effect. The pockets where Covid-19 has bloomed such as Seattle tend to be areas with the most anti-vaxxers. A study published in the Public Library of Science journal PLOS Medicine listed Seattle as having one of the lowest vaccination rates in America. Look at the first bloom in New York State where enough anti-vaxxers live that they had a MEASLES outbreak last year. The first bloom was in New Rochelle just outside of New York City and involved an Orthodix Jewish community. Many (Not a majority but many in some areas) Orthodox Jews believe immunization is against Jewish law. Only 28 million flu vaccines are available annually in China and I theorize that was part of the problem in the rapid spread. The flu shot and our immunizations at birth do not protect against everything and will not keep us from catching Covifd-19 but they might teach our immune system how to fight. An example might be our immunizations teach us to box in a rudimentary way. We enter an MMA ring and we do not know everything but we have at least a chance to defend ourselves.