Surprised by the condition of the person who injected 217 doses of Covid-19 vaccine into his body

German researchers have examined an 'over-vaccinated' man who they say received more than 200 doses of a Covid-19 vaccine without experiencing any noticeable side effects to his immune system.

Published in the Lancet Infectious Diseases medical journal on March 3, 2024, the researchers said the Covid-19 vaccine was "well tolerated," although they noted that this was an isolated case of "unusual vaccination boost."

WHO has recommended Covid-19 vaccine and booster shot. (Photo: REUTERS).

The man's case came to the attention of researchers when German prosecutors opened a fraud investigation, gathering evidence that he had received 130 doses of Covid-19 vaccines over a nine-month period – far more than recommended by health authorities.

'We learned about this man's case through newspaper articles, ' said Kilian Schober, one of the study's authors . 'We then contacted him and invited him to undergo various tests. He was very interested in participating in the study,' he said.

The man agreed to provide blood samples, including new samples, previous blood test results, and blood samples that had been frozen in recent years.

The man said he had received 217 Covid-19 vaccinations for 'private reasons'. German authorities have not brought criminal charges over the incident.

Going deeper into the study, scientists speculated that getting too many vaccine shots could cause a person's immune system to become fatigued.

Vaccines create immune memory cells that are on standby, ready to quickly activate the body's defense system in the event of a viral attack.

But in fact, the researchers found that the man had more immune cells — called T cells — than a control group that had received three standard doses of the vaccine.

The scientists also did not detect any signs of fatigue in these cells, which they say is as effective as people who have received some common Covid-19 vaccines.

'Overall, we did not find any signs of a weaker immune response,' said Katharina Kocher, one of the study's lead authors.

Even after the 217th vaccination, researchers said the shot was still effective as the man's level of antibodies against the Covid-19 virus 'increased significantly' .

The man insisted on getting another dose of the vaccine during the study, and blood samples were taken to determine how his immune system responded, researchers said.

However, the researchers also cautioned that despite the findings, they 'do not advocate excessive booster vaccination as a strategy to enhance adaptive immunity'.

Although scientists found no signs that the man had ever had Covid-19, researchers said they could not establish a causal link between his 'boosted vaccination regimen' and his lack of infection.

Medical staff inject Covid-19 vaccine to people in Berlin, Germany. (Photo: AFP/TTXVN).

More than 60 million people in Germany have been vaccinated against Covid-19, and most of them have received multiple doses.

Germany has launched its autumn vaccination campaign to prevent the spread of the SARS-CoV-2 virus, using a single dose of an upgraded Covid-19 booster vaccine for the elderly and those at high risk of the disease.

Germany's Robert Koch Institute for Disease Control (RKI) said its Vaccine Advisory Council of independent experts has reiterated its recommendation that booster shots should only be given in addition to the standard Covid-19 vaccination program to certain high-risk groups.

Health Minister Karl Lauterbach stressed that people over 60 and high-risk groups should get vaccinated against Covid-19. Ideally, it should be combined with the flu shot.