1. Immune responses in COVID-19 and potential vaccines: lessons learned from SARS and MERS epidemic;Prompetchara;Asian Pac J Allergy Immunol,2020
2. Considering BCG vaccination to reduce the impact of COVID-19;Curtis,2020
3. Bcg vaccines may not reduce covid-19 mortality rates;Singh,2020
4. COVID-19 infection: the perspectives on immune responses;Shi,2020