Inoculation with live attenuated vaccines (LAV) such as those used against TB, polio or measles can stimulate the immune system to provide protection against other infectious diseases, including COVID-19, says a new study.

Inoculation with live attenuated vaccines (LAV) such as those used against TB, polio or measles can stimulate the immune system to provide protection against other infectious diseases, including COVID-19, says a new study.