By Sudibyo M. Wiradji.  Originally published on The Jakarta Post  To prevent the further spread of COVID-19, the government has issued policies, which include calling on people to practice social distancing and avoid crowds. Maintaining a strong immune system can reduce the possibility of being infected by COVID- 19. The term immunity refers to the body’s ability to fight external threats, including various micro-organisms and toxins, as well as internal threats that may come from … [Read more...]