Having a serious case of COVID-19 may mean long-lasting immunity, a new study finds.
"That means that people are very likely protected for that period of time," Charles said in a hospital news release."We showed that key antibody responses to COVID-19 do persist."
The researchers also found that COVID-19 patients had immunoglobulin A and immunoglobulin M responses that dropped to low levels within 2.5 months. "We can say now that if a patient has IgA and IgM responses, they were likely infected with the virus within the last two months," Charles said. Knowing how long an immune response lasts can help get more accurate data about the spread of SARS-CoV-2, said study co-author Dr. Jason Harris, a pediatric infectious disease specialist at Mass General.
"Knowing how long antibody responses last is essential before we can use antibody testing to track the spread of COVID-19 and identify 'hot spots' of the disease," Harris added.
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