References:
Science Direct (2019). Immunity. https://www.sciencedirect.com/topics/immunology-and-microbiology/immunity
Woodruff (2014). Has the COVID-19 Lockdown Affected Our Immune Systems? https://woodruffmedical.edu/has-the-covid-19-lockdown-affected-our-immune-systems/
Science Direct (2019). Immunity. https://www.sciencedirect.com/topics/immunology-and-microbiology/immunity
Woodruff (2014). Has the COVID-19 Lockdown Affected Our Immune Systems? https://woodruffmedical.edu/has-the-covid-19-lockdown-affected-our-immune-systems/