My sibling and spouse recently tested positive for IgM and IgG antibodies.
They were minorly ill in November and experienced the classic loss of smell and taste. They didn't see anyone at the time but when this cheap antibody test was offered 3 months later they were curious.
That made ME curious, lol. I believe I was exposed to Covid on 3/13/2020 (where our state's breakout began.) However... I was also in my sibling's presence face to face in November without masks.
Frankly, I eat and drink so much I am not sure I would notice loss of smell and taste...but I did have the other symptoms of Covid last March, and since.
So my IgM was positive but my IgG was negative. I realize each one could be a false result.
Barring that, what conclusions can I draw from each result?
Is there a test for the age of my antibodies?
Do antibodies have a shelf life after which you might test negative?
What other viruses might this test have detected besides Covid? (I did have RSV-B 3 yrs ago.)