Abstract: COVID-19 is a highly contagious virus that first appeared in China in December 2019. It has affected over 157 million people and killed over 3.2 million. The paper reviews the function of the immune system for COVID-19 prevention, depression, and anxiety due to COVID-19 and their effects on the immune system and the relationship of aging with the immune system and depression and anxiety. It has been found that several elderly people lack the coping mechanisms required to deal with the stress caused by COVID-19. Hence, identifying the factors and mechanisms that lead to this resilience will aid in the development of preventive measures for certain elderly people and groups with more severe mental health problems. Additionally, it would be beneficial to understand how technology could be leveraged to accomplish this goal. During the pandemic, various steps such as social isolation, quarantine, and self-isolation are needed to be implemented properly to slow the spread of the virus. Meanwhile, to help halt the pandemic, everybody must be vaccinated as soon as possible until any bans on social gatherings and social isolation can be removed, allowing other sectors such as schooling, social activities, and life to resume normalcy.
Keywords: COVID-19 Pandemic; Social Gatherings; Social Isolation; Mental Health; Immune System; Elderly People.