New emerging viruses like coronavirus 2019 (COVID-19) infections are always frightening. We know little about their
transmission, behaviors, clinical manifestations, and outcomes. There is no vaccine or therapeutic strategies to deal
with these infections yet. In this situation, preventive measures may be promising. Hand hygiene is a very important
issue in preventing viral infection; however, there are other entities that can enhance the immune response and help in
infection prevention. Herein we review some measures for boosting the immune system.
Level of evidence: Moderate