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 have 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 towards reinfection. The dangerous information: Even for those who’ve had COVID, there stays a danger you will get it once more.

“That may not trigger issues for the affected person, and definitely younger individuals — like these in our examine — are principally asymptomatic,” Sealfon mentioned. “However it actually can imply that there’s a danger that they’ll then transmit a brand new an infection to those that are extra susceptible.”

Which means mask-wearing, social distancing and getting vaccinated will nonetheless be vital, no matter your prior an infection historical past.

“Vaccination to supply extra safety continues to be warranted for individuals who’ve been contaminated,” Sealfon mentioned. “As a result of we all know that you just 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. “It’s important to be very cautious deciphering all of the COVID research which are popping out now, a lot of which haven’t been peer-reviewed.”

Cinti mentioned a viral an infection sometimes does present safety from additional an infection.

“Is there the opportunity of reinfection with COVID? Possibly,” 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 think it is also that prime, however we do not know that.”