I hope your cousin gets better. Covid has given us such a mixed bag of information and variety of responses. Most of my family has had it, although I haven't yet. I always figured if i caught it I would get the worst possible case because I got such an awful case of pneumonia when I was in my thirties and have gotten a flu shot every year since then. My kids, both vaccinated and unvaccinated, along with their spouses and kids have gotten Covid. Some got very sick, others not so much.