The fact that people who have recovered from COVID-19 can become reinfected suggests that immunity against SARS-CoV-2 may not be long-lasting.
Not only is it much faster than conventional tests, it does not need to be performed in special biosafety laboratories.
Silent infections may have contributed to the rapid spread of COVID-19 at the dawn of the pandemic, a modeling study in China shows.
Researchers were surprised to find memory T-cells in people with no history of SARS, COVID-19, or contact with SARS or COVID-19 patients.
Antibodies against the SARS-CoV-2 virus faded within two to three months after infection in asymptomatic patients, finds a Chinese study.