Last week, I shared that my youngest son had been sent home from school due to close contact with a student who was Covid positive. The school's policy is that unvaccinated children who had Covid-19 over 90 days ago and were in close contact with another student need to quarantine for five days at home, but can return to school with a mask days 6-10.
Whereas unvaccinated children who had Covid-19 less than 90 days ago or who were vaccinated could stay in school but are required to wear a mask for 10 days. This is due to the myth that you lose your antibodies and therefore your immunity to Covid-19 after 90 days, which I discuss in a podcast here, and a blog article here.
The level of one's antibodies is not related to one's immunity to Covid-19 due to memory B-cells which can generate a robust immune response by quickly making antibodies upon re-exposure. Nonetheless, I decided to have my and my boys' IGG antibody levels tested to see where they were.
My IgG antibody levels were 71.4 AU/mL. As the image above indicates, anything above 13 AU/mL is considered "positive." My oldest son had the highest level of IgG antibodies at 82.2 AU/mL and my youngest son had the lowest at 56.8 AU/mL. As I've mentioned, we definitely had Covid-19 in early November. We most likely had it again on New Year's Day.
My plan is to have us tested every month to see how long these levels last.