Giving smaller vaccine doses in multiple shots is often more effective than a larger single dose.
In September, production of rapid tests really ramped up in the US. But due to low accuracy and massive numbers needed, these tests alone are unlikely to have much of an effect on the pandemic.
Testing large numbers of people regularly would reduce the spread of the coronavirus in the US. Laboratory testing is slow and expensive, but rapid screening tests could be the answer.
An antigen test was given emergency use authorization by the FDA in early May. A biochemist explains how COVID-19 antigen tests work.