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Studies have found that immunity to coronavirus lasts for several months



Although the report seems to be confused and contradictory with a similar report issued this week in the UK, it is not the case. People’s body will produce a lot of immune compounds due to infection, some of which will be overwhelming at first and then die quickly, while others will slowly build up.

A new report released on Wednesday shows that 90% of people recovering from Covid-19 infection maintain a stable antibody response.

“Although there are reports that antibodies against this virus disappear quickly, we found that the situation is just the opposite-more than 90% of patients with mild or moderate disease have an antibody response sufficient to neutralize the virus, and the response has been maintained for many months. ,”

; Florian Krammer, professor of vaccinology at Icahn School of Medicine at Mount Sinai, said in a statement.

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The team studied the antibody response of more than 30,000 people who tested positive for Covid-19 in the Mount Sinai Health System between March and October. They rated the antibody response as low, medium or high. More than 90% of people have moderate to high levels or titer of antibodies to the virus’s spike protein-this structure is used to catch the cells it infects.

Then, they carefully studied 121 patients who recovered and donated plasma-once three months after the first symptoms, and again after five months.

They did see a decline in certain antibodies. But they persevered, and they published an article in the journal Science.
New report shows coronavirus immunity can last for months

“The serum antibody titers that we initially measured in individuals may be produced by plasmablasts, which are the first responding cells to the invading virus and gather together to produce initial antibodies whose strength quickly disappears,” clinical director Ania Wajnberg Said the doctor. Antibody test at Mount Sinai Hospital.

“The sustained antibody levels we subsequently observed were probably produced by the long-lived plasma cells in the bone marrow. This is similar to what we have seen in other viruses, and may mean that they will continue to exist. We will continue to focus on this group. Let’s see if these levels remain stable as we hoped.”

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Antibodies are not the only protection of the immune system against infection, but they are an important first line of defense.

The research team wrote: “Although this does not provide conclusive evidence that these antibody responses can prevent reinfection, we believe that they are likely to reduce the chance of reinfection.”

Covid-19 has only been around for less than a year, so scientists are still learning about it. People have been infected more than once, most of them are anecdotes, and they are far apart.

There are obvious concerns about this. If people have permanent immunity to the virus after infection, it would be better to eliminate the pandemic. And, of course, immunity is essential for the vaccine to work properly.

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It happens with other viruses. Measles is an example. A measles usually makes someone immune for life-this effect is called bactericidal immunity. The same is true for smallpox, before the global vaccination campaign eliminated the virus in the 1970s. The correct measles and smallpox vaccination can completely prevent infection.

But respiratory viruses such as flu are trickier. People can get flu over and over again, and flu vaccines usually only provide partial protection against infections and serious diseases. Part of the reason is due to flu’s tendency to mutate.

The coronavirus seems to be somewhere in between. They cause the common cold, but because they are usually not fatal, they have not been fully studied. Before the emergence of the deadly cousin of Covid-19, SARS, there was little interest in the coronavirus.

Nevertheless, there is evidence that people can and do develop immunity to the coronavirus.

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Wajnberg and colleagues wrote: “We learned from our cooperation with common human coronaviruses that neutralizing antibodies can be induced, and even if the individual is re-infected, these antibodies can last for several years and provide protection against re-infection or Reduce disease.”

“It is unclear whether human infection with SARS-CoV-2 can prevent reinfection and how long it lasts.”

They said that the next important step will be to establish a so-called protection link. These are compounds that can be measured in the blood, and they can tell the doctor if someone is immune-so there is no need to wait to see if they get infected again after an attack or a vaccine.


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