According to foreign media reports, Frederic Sinistra, a 41-year-old Belgian free-form boxer who refused treatment several times after being infected with the new crown virus, died of complications of the new crown on December 15, and his wife posted his death on his personal social media account on December 16.

Sinistra strongly opposed the new crown vaccine before his death, he believes that the new crown virus is not dangerous, and some media reports say that he is not even willing to mention the word "COVID-19", he defines the new crown virus as "small virus". And through its own account with 37,000 followers, it protested the epidemic prevention measures implemented by the Belgian government.
According to Sinistra's own social media account, he has won three free-fighting world championships, with a record of 39-9 losses, and after being infected with the new crown, the Belgian fierce man still insisted on training.
At first, Sinistria was found to be infected with the new crown virus and did not care about it, until he began to have severe asthma in retraining, and he went to the hospital for treatment. But the first treatment sinistra did not follow the doctor's instructions, but left the hospital without permission and returned home, wanting to treat herself through oxygen. At the end of November, Sinistria's coach, Osman Yigin, forced him to be hospitalized, saying in an interview that he threatened Sinestra "if he is not hospitalized, he will not train himself."
Sinistria then posted on social media photos of herself in the intensive care unit covered with tubes.
On December 7, Sinistra also posted on her social media account that she would soon return to training and participate in a match in Turkey on January 28. On December 13, Sinestra once again posted a feed on social media accounts. Two days later, on December 16, the account released the news of Sinistra's death, which, judging from the content, was sent by his wife.
Like Sinistra, his wife was skeptical of the dangers of the coronavirus, and even after Sinistra's death, her wife still believed that it had nothing to do with the new crown virus. According to foreign media reports, in Belgium like Sinistria who oppose vaccination and protest against epidemic measures, there are a few people who argue that Omicron, a variant of the new crown virus, is raging in Belgium. Medical staff claimed most of the patients were not vaccinated and hospital staff were exhausted due to the surge in hospitalizations. The data shows that unvaccinated people are 6 times more likely to enter the intensive care unit after contracting the new crown virus than vaccinated people.