The table below shows confirmed cases of COVID-19 reinfection. The first confirmed case of reinfection was reported in Hong Kong on August 24, and six others were reported later that week. Earlier cases of suspected reinfection could not be confirmed due to a lack of data.
People with SARS-CoV-2, the virus which causes COVID-19, may continue to test positive for several months without being sick or infectious. A reinfection is confirmed when testing shows each virus’ genetic makeup is different to a degree which cannot be explained through in-vivo evolution.
For a timeline of new cases, scroll down.
Reporting on reinfections is limited. If you believe we have missed a case, please let us know by sending us an email at [email protected]. You can also reach us on Twitter by sending a DM to @BNODesk.
- Reported: The month in which the reinfection is publicly reported. Due to the amount of research required to confirm a reinfection, the actual case may have occurred weeks or months earlier.
- Interval: The number of days between recovery from the first case and the onset of symptoms from the second case, if available. If not available, the number of days between positive tests.
- Scientists in India are reporting the first two genetically confirmed cases of reinfection. The cases, in a 25-year-old man and a 28-year-old woman, were detected during routine screening of healthcare workers at a hospital in northern India. There were 100 and 101 days between the two cases, respectively. “Both individuals were asymptomatic but had a higher viral load in the second episode of reinfection,” the team said in a pre-print paper, which added that asymptomatic reinfection may be under-reported. The team is investigating 6 other cases of reinfection in Mumbai and Delhi: Initial research has shown the viruses were genetically different in each episode, but additional research is pending. (Source 1, Source 2)
- Reinfection cases have been reported in India over the past few days, but none have been scientifically confirmed. People with coronavirus may continue to test positive for several months without being sick or infectious. As a result, we only add cases in which the genetic makeup of each virus was shown to be different.
- A new paper provides more information about the reinfection in a 51-year-old woman in Belgium. The case was first reported on August 24. (Source)
- A paper from the Institute of Microbiology at the University of San Francisco Quito provides more details about the reinfection case in Ecuador. (Source)
- A study in Iceland has found that antibodies against SARS-CoV-2 remain stable for at least 4 months, which is the period covered by the researchers. No antibodies were detected in a small number of cases, which suggests some people may produce no or undetectable levels of antibodies. or they received a false positive on their PCR test. Among people who recovered, antibody levels were higher in older people and those who were more severely affected by coronavirus. Smokers had lower levels of antibodies. (Source)
- The case in Belgium, which was first reported on August 24, has been updated with more information. In an email to BNO News, virologist Marc van Ranst said the patient is a 51-year-old woman with no underlying conditions. She suffered mild symptoms during the first infection, including fever, cough, and shortness of breath, and was unable to work for 5 weeks. She suffered the same symptoms during the second infection but they were less intense and lasted for one week. There were 93 days between the two cases. (Source)
- First case in Ecuador. The 46-year-old man from Quito tested positive in May when he suffered from mild symptoms, including a headache and fatigue. The patient returned in August while suffering from more serious symptoms, including a fever, chest pain, cough, and a sore throat, and again tested positive. The period between the two cases is 81 days. High levels of IgG antibodies were found after the second infection. The patient’s wife is a suspected case of reinfection, but there is insufficient data to confirm this. (Source 1, Source 2)
- First case in the United States. A 25-year-old man from Reno, Nevada, tested positive for coronavirus in April and suffered mild symptoms. He tested negative on May 9 and continued to feel well until May 28, after which he developed serious symptoms. He again tested positive for coronavirus when he was hospitalized on June 5. Due to privacy laws, the research team was unable to comment on the patient’s current condition. (Source 1, Source 2)
- Three more cases in the Netherlands. One is a nursing home resident who developed a second infection after 2 months. The other two cases are in Tilburg. The first case, a man in his 80s, suffered two bouts of mild symptoms with an interval of roughly 21 days. The second patient, a man in his 60s, had mild symptoms during the first infection but quickly recovered. The man returned several days later as he suffered from respiratory failure and again tested positive for coronavirus. According to Dr. Jean-Luc Murk, this could be a double infection or reinfection before the patient was able to build immunity. (Source 1, Source 2)
- First case of reinfection in the Netherlands. (Source)
- First case of reinfection in Belgium. A woman in her 50s tested positive for coronavirus in the second week of March, and then again in June. Details about her symptoms are unknown. The woman has recovered. (Source)
- Hong Kong University has reported the first proven case of COVID-19 reinfection in a 33-year-old man. During the first episode, he suffered from cough and sputum, sore throat, fever, and headache for three days. He tested positive on March 26, 2020, and was discharged from hospital on April 14. Months later, on August 15, the patient tested positive again upon his return to Hong Kong from Spain via the UK.He was hospitalized but remained asymptomatic. (Source)