Masking was an important early defense and it worked, to the extent it was used.The people in Hong Kong had an obsession with wearing masks and they are having a big run on covid. So bad that the government is testing everyone and major restrictions have been imposed.
In the early days, New York covid nurses were catching covid at a lower rate than the general population.
Omicron is different. It is far more virulent. Omicron BA2 variant is far more virulent still. As well, everyone who wants vaccine has had the opportunity. It's time to open the flood gates.
There is a lot of covid science based in Europe. There is some but very little in North America.
Science means open, published, and peer reviewed.
None of the covid vaccine trials have been published. The FDA approval process is also not published. CDC has published almost no data.
The earliest access to information is expected to be from moderns. They have said they will accept requests for trial information by the end of 2022 and will try to fulfill those requests by the end of 2023. That is years between trial and shared data.
mRNA vaccine was engineered, no doubt by some very clever people, but it is not based on science.