Resurgent coronaviruses are more dangerous than expected

Updated 11/21/2022 at 9:55 am

  • The likelihood of serious illness is higher with a second coronavirus infection than with the first.
  • This follows from a new study from the US.
  • According to this, the risk of hospitalization in the case of reinfection is three times higher than in the case of the first illness of COVID-19.

More news about the coronavirus

Anyone who has already contracted COVID-19 and survived the coronavirus without long-term effects might have assumed that further infections would be harmless. Scientists are now warning: Because anyone who has put off Corona well is not automatically immune to a severe course in case of reinfection.

Researchers from the Washington University School of Medicine in St. Louis and Veterans Affairs St. Louis Health Care System examined the health consequences of reinfection in a new study. It has been shown that additional coronary disease “may pose a significant additional risk of health impairment in multiple organ systems,” according to a report from the Washington University School of Medicine in St. Louise. The results of the study were published in the journal “Nature Medicine”.

The renewed corona infection brings additional health risks

According to the study, disabilities that occur during a renewed illness of COVID-19 can be so severe that the disabilities must be treated in a hospital. The risk of hospitalization is three times higher for reinfection than for a first infection, and the risk of death is twice as high.

Patients who were reinfected suffered from lung and heart diseases, for example. According to the study, reinfection is three times more likely to cause lung problems than the initial infection.

Effects on the brain, blood, musculoskeletal system and gastrointestinal tract have also been shown. The statement goes on to say, “Reinfection also contributes to diabetes, kidney disease and mental health problems.”

The risk is likely to increase with the number of coronaviruses

One of the authors of the study, clinical epidemiologist Ziyad Al-Aly, explains: “Our research clearly showed that a second, third or fourth infection leads to additional health risks in the acute phase, i.e. in the first 30 days after infection and months later, i.e. in the long-term phase of COVID.”

The scientific team also concludes from their results that the health risk increases with each additional coronavirus infection. According to the co-author, even after two COVID-19 infections, it is better to avoid a third one. “And if you’ve had three infections, you should avoid a fourth.

Also read: British corona patient recovered after 411 days of infection

The authors of the study recommend caution – especially in winter

Al-Aly said: “In recent months, there has been an air of invincibility among people who have contracted COVID-19 or have been vaccinated and boosted, especially among people who have been infected and are being vaccinated.” The researchers do not recommend this in their study. Strategies to prevent reinfection are necessary, they appeal.

Al-Aly warns of the so-called “twindemic of COVID-19 and influenza” and advises: “Ahead of the winter season, people should be aware of the risks and be vigilant to reduce the risk of infection or re-infection with SARS-CoV. -2.”

For the study, the scientific team used data from the National Health Database of the US Department of Veterans Affairs. It compared a dataset of 5.3 million people who did not test positive for COVID-19 from early March 2020 to April 6, 2022, with data from 443,000 people who tested positive for the coronavirus once during the same period. They then included a third group in their investigation: nearly 41,000 people who had two or more documented cases of the coronavirus.

Used sources:

  • Mitteilung der Washington University School of Medicine in St. Louis: “Repeated COVID-19 infections increase risk of organ failure, death” (Nov 10, 2022)
  • Study in the field of “Natural Medicine”: “Acute and post-acute consequences associated with SARS-CoV-2 reinfection” (Veröffentlicht am 10 November 2022)


A study from Dresden confirms that Post COVID can affect people of all ages. About a quarter of the participants were still suffering from long-term effects six to twelve months after being infected with the coronavirus.

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