https://atlantak.com/%ea%b0%90%ea%b8%b0-%eb%a8%bc%ec%a0%80-%ea%b1%b8%eb%a6%ac%eb%a9%b4-%ec%bd%94%eb%a1%9c%eb%82%9819-%ec%9e%98-%ec%95%88%ea%b1%b8%eb%a6%b0%eb%8b%a4/
감기 먼저 걸리면 코로나19 잘 안걸린다?