I caught COVID off my kids. It is real. I’ve never had flu in my entire life. I ran a low grade fever for 3 days and had one blocked and burning nostril that persisted for about a week. No discharge of mucus, just inflammation. In short my immune system laughed off the infection and stopped it traveling to the lungs and the disease developing. If you display no symptoms after a few days I wouldn’t worry, I’ve you develop symptoms like I’ve described unless your a fat fuck or have abused and not looked after your body I still wouldn’t worry.