Taking vitamin D3 daily should help, particularly older people. "Thus, a healthy vitamin D3 status may help prevent viruses and bacteria from gaining a foothold

Taking vitamin D3 daily should help, particularly older people. "Thus, a healthy vitamin D3 status may help prevent viruses and bacteria from gaining a foothold in the body." https://scitechdaily.com/study-finds-vitamin-d3-important-for-fighting-infections-helps-strengthen-defenses-against-covid-19/ https://scitechdaily.com/study-finds-vitamin-d3-important-fo...