Scientists from the University of Missouri School of Medicine analyzed data from 62 American clinics on the health of more than 9.1 thousand patients who were hospitalized with a severe course of COVID-19 until November 2020. The results showed that 63 people (less than 1%) were re-infected on average 3.5 months after discharge from the hospital. Two people have died.
In general, virtually all patients had lower respiratory and hepatic impairment rates than after the first infection, and none of them required re-ventilation. According to scientists, this may be due to the fact that the second time patients received more effective therapy, as doctors receive more and more new data on the treatment of COVID-19, excluding toxic and useless drugs.
“Although re-infection was easier than the primary infection, mortality was associated with it,” the scientists warned.
The study authors also identified potential risk groups for re-infection: for example, smokers are almost twice as likely to be reinfected as people without nicotine addiction. The presence of bronchial asthma increases this risk three times, belonging to the black race – two times. At the same time, there were no significant differences in age and gender among patients who were infected twice.
Note that this study did not assess the risk of re-infection due to the spread of new variants of the coronavirus. However, according to the latest data, the delta variant of SARS-CoV-2, first discovered in India, is contagious by at least 40% compared to the “British” alpha variant, and the likelihood of hospitalization in infected patients doubles.