Re-infections are rare, some Covid long-term carriers are responding to vaccines: this week in the coronavirus news.

New studies that want to better understand the coronavirus and its effects appeared this week.

A large study in Denmark found that the vast majority of people who recover from Covid-19 remain protected from the virus for at least six months, researchers reported Wednesday. Re-infections can occur, but they are rare. The study suggests that immunity to a natural infection is unpredictable and unequal, emphasizing the importance of vaccinating everyone – especially older people, experts said.

“You can certainly not rely on an infection in the past to get sick again, and possibly quite ill if you are in the elderly segment,” said Steen Ethelberg, an epidemiologist at Statens Serum Institut, Denmark for public health. .

Scientists have said that reinfections are likely to be asymptomatic or mild because the immune system will suppress the virus before it can cause much damage. The researchers also did not assess the possibility of re-infection with newer variants of the virus.

New research has also begun to study the effects of the vaccine on patients with long-term Covid-19 symptoms. It is too early to say whether the shots have a broad beneficial effect on patients with persistent problems, sometimes known as ‘elongated’, but scientists are intrigued by the phenomenon after patients in the United States and Britain reported relieved symptoms after they the second dose of the vaccine.

Dr. Daniel Griffin, a physician at Infectious Diseases at Columbia University, said about 40 percent of the long-term Covid patients he treated cite the improvement of the symptom after vaccination.

And this month, a small study by British researchers who have not yet been peer-reviewed, those vaccinated eight months after people were admitted to hospital for Covid-19 had improvement in longer Covid symptoms than those who had not yet been vaccinated. The 44 vaccinated patients in the study were older and had more underlying medical conditions, as people with these characteristics had previously qualified for vaccinations.

Additional information comes from two admissions of several hundred people with long Covid symptoms, many of whom were never admitted to the hospital due to the disease.

Here’s what we learned this week:

  • Who can be vaccinated and who can not? Across the world, admission requirements vary drastically. Age is a determining requirement in most places, but in others, income and commitments can be much more important.

  • Prisons in the United States have been hit hard by the coronavirus, but a state-by-state patch of vaccine rules has left prisoners with different views, even though the Centers for Disease Control and Prevention has recommended prioritizing it.

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