Hi…my husband and I are participating in an NIEH study to look at Covid antibodies over one year. We just started but have several friends that have participating for a while. They do a blood test 5 times over the year. Each person get results on 1)if you’ve had Covid and that antibody level and 2) your vaccine antibody level. I’m hoping my antibody level is good so that I don’t need any more boosters! The lab is in the RTP near Durham, NC. Here’s the link… https://joinastudy.niehs.nih.gov/studies/antibody-detection/index.htm