Without testing how can anyone know if they actually got it twice? There are thousands of different viruses that can cause fever, fatigue, and coughing, and COVID isn’t the only virus that can cause loss of smell/taste.
I personally know someone who had all the classic symptoms around 3 months ago and assumed it was covid and didn’t get tested. About 2 weeks ago he had all the symptoms again and got tested for antibodies as well as a nasal swab. Turns out he doesn’t have antibodies (unless they completely wore off in under 3 months) and the swab came back positive.
I’ve also know several people who had the virus right after Purim (confirmed with symptoms, a nasal swab and subsequent development of antibodies) who got tested for antibodies again over the past 2 weeks and the antibodies test came back negative.
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