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Scientists say immunity after coronavirus infection for at least five months.



As the COVID-19 vaccine begins serving people infected with the coronavirus, many people suspect they should still get the vaccine. It’s an important question rooted in immune science: Indeed, with certain viruses, such as chickenpox, people are immune for life after contracting. In the case of many other viruses, such as influenzas, the patient’s immune system “forgets” how to identify and prevent the virus again after a period of time, which can be months or years. As the new coronavirus is new, it is not known how long after the virus is recovered, how long it will remain immunity and if it might affect vaccination.

The Centers for Disease Control and Prevention (CDC) are now saying that people recovering from COVID-1

9 should be vaccinated. Their advice is in part due to a lack of conclusive information on how long immunity lasts after infection.

“Experts do not yet know how long someone will be protected from getting sick after recovering from COVID-19,” the CDC said.

But experts are constantly working to find out. According to a new study published Thursday, scientists from Public Health England (PHE) think natural immunity lasts up to five months. But that’s not a certainty and there are some caveats.

There have been cases of patients who received two coronavirus cases, as evidence that the infection did not immunize alone forever, at least in some patients. Previous studies have suggested that natural immunity lasts between three and six months. But a new UK study framed it a different way. Specifically, the study found that previous COVID-19 infection reduced the risk of re-infection by 83 percent compared with those who had never been infected. Entering the percentage of chance of recurrent infection is helpful for public health professionals and citizens to calculate risk.

The study tested nearly 21,000 health workers for COVID-19 and COVID-19 antibodies in the UK’s National Health Service between June and November of 2020.During that period, 6,614 participants tested for antibodies. COVID-19 positively and 14,000 cases had no signal. Of a previous infection However, among those who received a positive antibody test, there were 44 medical staff who tested positive for antibodies. “Chances of re-infection,” according to a press release about the study in several months

So what does this mean?

This means that even if you believe you already have this disease and be protected. But you can be sure you are very unlikely to have a serious infection. But there is always a risk that you will get it and infect others. Susan Hopkins, senior medical advisor for Public Health England and the study leader, said in a statement. “It’s important that all of us stay at home to protect health services and save lives.”

Another relevant finding from the research is that people previously infected can still receive high enough levels of the coronavirus to continue transmitting the infection.

“We now know that most people who have been infected with the virus and develop antibodies are protected from re-infection. But it’s not all inclusive and we don’t yet know how long the defense will last, ”Hopkins said. “More importantly, we believe people may still be able to transmit the virus.”

Hopkins emphasized that this study painted a picture. “Today’s clearest picture of antibody characteristics in the prevention of COVID-19”, however, these “early findings” should not be “misunderstood”. you

As Salon explained earlier, it is difficult to study long-term immunity using human data as coronavirus is new to science. One very interesting study, published in the scientific journal Nature Medicine, suggests that natural immunity can last up to 12 months, but studies of four different seasonal coronaviruses are not. The new corona virus (known as SARS-CoV- 2).

Some viruses, such as measles, provide lifelong immunity to people who are infected or who are vaccinated against. But science continues to suggest that this is not the case with SARS-CoV-2. It is also unknown how long the immune system lasts from the COVID-19 vaccine. That “temporary immunity” might mean a vaccine is not a one-time deal. They may need a booster or even a seasonal vaccine like influenza.

“This could turn out to be a single or two non-vaccine, maybe a single dose and a trigger, or it could be what we call a seasonal vaccine.” Or a vaccine that must be given every few years, ”Dr. Charles Chew, professor of infectious diseases at the University of California-San Francisco, said in September. He noted that transient immunity can also cause problems for countries with immunization. Public health experts hope that humans can eventually get rid of the coronavirus through a combination of vaccination and relief strategies such as masking and social aloofness.

“The hope is that vaccines, even if the vaccine may not be 100 percent effective or resistant. But that’s enough, so if we have enough testing and quarantine measures, we can eradicate the virus, ”Chiu said.


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