The information: A person within the US caught covid-19 for a second time within the area of simply two months, in response to a examine revealed in The Lancet Infectious Diseases. That makes him the fifth particular person to have formally caught the coronavirus twice, after circumstances recorded in Hong Kong, Belgium, Ecuador, and the Netherlands (and there will definitely be extra circumstances we do not find out about). Nevertheless, what’s unusual about his case is that he had had a worse bout of sickness the second time. His medical doctors in contrast the genome of the virus through the two sicknesses and located they had been too totally different to have been attributable to the identical an infection. There’s just one different recorded occasion the place this has occurred—the case in Ecuador.
The main points: The 25-year-old man examined optimistic for the primary time on April 18, after experiencing a number of weeks of signs together with sore throat, cough, headache, nausea, and diarrhea. He felt absolutely recovered by April 27, and examined adverse for the virus on each Might 9 and 26. However simply two days later, on Might 28, he developed signs once more, this time with fever and dizziness too. He examined optimistic on June 5 and wanted to be hospitalized after his lungs had been unable to get sufficient oxygen into his physique, inflicting hypoxia and shortness of breath. He had no underlying well being situations. The person has now recovered.
The importance: Being contaminated as soon as doesn’t imply you’re protected against being contaminated once more, even when such circumstances are nonetheless vanishingly uncommon, with simply 5 recognized out of almost 40 million confirmed circumstances worldwide. Meaning individuals who have had covid-19 nonetheless want to remain vigilant, following the recommendation on social distancing, sporting face masks, and avoiding crowded, poorly ventilated areas. This was not altogether sudden: coronavirus specialists warned us that different coronaviruses, such because the frequent chilly, are seasonal. Nevertheless, there are nonetheless many questions that researchers are racing to reply. How a lot safety does having covid-19 confer? Is that primarily by way of antibodies or T cells? How lengthy does safety final? What does it imply for the medical therapies which can be being developed, or for vaccines? Will all of us require a yearly shot moderately than a one-off vaccine, for instance? If nothing else, this new case is a reminder of how a lot about this virus we nonetheless don’t know.