If I work in the healthcare field, would it be a good idea to take out policies with the presence of COVID-19?

It is not necessary to take probiotics for prevention of viral infections like Covid-19. Instead, focus on maintaining a healthy lifestyle by eating a diverse and colorful diet, getting enough sleep, exercising regularly, managing stress, and practicing good hygiene, such as washing hands properly and avoiding touching the face with hands. This approach will be more beneficial for overall health.