Is it of any positive being COVID-19 positive?: Cross-protection hypothesis

Many pathogens have been reported to induce cross-protective immune responses against other related and unrelated pathogens due to shared epitopes or induction of trained immunity. Herein, I review the evidence we have so far on the possible SARS-CoV-2 cross-reactions with other pathogens, and the immune modulatory effects it could induce, which could lead to beneficial effects against other diseases among COVID-19-recovered immunocompetent individuals.