Coronavirus antibodies last at least three months after infection, study suggests.

[2greys]

Coronavirus antibodies can last at least three months after a person becomes infected with the virus that causes COVID-19, according to a study published today in Science Immunology.

Researchers from the University of Toronto and the Lunenfeld-Tanenbaum Research Institute (LTRI) at Sinai Health used both saliva and blood samples from COVID-19 patients to measure and compare antibody levels for over three months post-symptom onset.

They found that antibodies of the IgG class that bind to the SARS-CoV-2 spike protein are detectable for at least 115 days, representing the longest time interval measured. The study is also the first to show these antibodies can also be detected in the saliva.

medicine.utoronto.ca/news/c...

[Angelagone]

Does this explain why Sharon keeps testing positive ?

[2greys in reply to Angelagone]

Not really end of July and 3rd week of Sept it is only a matter of 7 weeks. No symptoms and the same with me. Plus we were both originally infected in the middle of April. I highly suspect the contamination of the samples.

Plus the rule is to have to wait 6 weeks before being tested again because of the test picking up dead cells that contain RNA reminants. At the end of July she was tested as positive and 2 weeks later she took the test again, along with myself, so I could have my PET scan and we both came back as negative. It would not be possible to be tested negative 2 weeks after being tested positive.

The article deals only with antibodies, T cell immunity is much more important, unfortunately it is much harder and more expensive to to test for T cells and requires a blood sample.

[2greys in reply to Angelagone]

Teens in Sicily isolating for longer than three weeks waiting for a negative test before they will be released.

bbc.co.uk/news/newsbeat-544...