Reinfected Marines additionally had decrease ranges of antibodies from their preliminary bout, in contrast with Marines who did not get reinfected.
“Two-thirds of the 19 Marines who had been reinfected did not have measurable neutralizing antibodies,” Sealfon famous, suggesting that some individuals who get contaminated do not generate antibodies.
The excellent news: Having antibodies after an infection does defend you in opposition to reinfection. The unhealthy information: Even should you’ve had COVID, there stays a threat you will get it once more.
“That may not trigger issues for the affected person, and definitely younger folks — like these in our examine — are largely asymptomatic,” Sealfon mentioned. “But it surely actually can imply that there’s a threat that they will then transmit a brand new an infection to those that are extra weak.”
Meaning mask-wearing, social distancing and getting vaccinated will nonetheless be essential, no matter your prior an infection historical past.
“Vaccination to offer extra safety continues to be warranted for individuals who’ve been contaminated,” Sealfon mentioned. “As a result of we all know that you simply actually increase your antibody response with vaccination, even when you have already got antibodies.”
However Dr. Sandro Cinti, a professor of infectious illness at Michigan Drugs on the College of Michigan in Ann Arbor, mentioned it is best to not learn an excessive amount of into these findings.
“These are early outcomes, with a really small variety of sufferers,” he famous. “You need to be very cautious decoding all of the COVID research which can be popping out now, lots of which haven’t been peer-reviewed.”
Cinti mentioned a viral an infection sometimes does present safety from additional an infection.
“Is there the potential of reinfection with COVID? Perhaps,” he mentioned. “However none of those research reply that query wherever close to definitively. The one factor definitive is that we simply do not actually know.”
The U.S. Facilities for Illness Management recommends everybody 18 and older get vaccinated — whether or not or not they’ve had COVID, Cinti mentioned.
“It is sensible as a result of we all know the safety fee with vaccination is about 95%, and we do not know what the safety fee is for COVID sufferers,” he mentioned. “I believe it is also that top, however we do not know that.”