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بهترین سایت شرط بندی ایرانی
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Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Coronavirus antibodies fade fast but protection may last, study shows

City of Cape Town urges people to leave Kataza the baboon alone

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A vehicle that was hit in the accident. A truck driver was killed in a horrific sequence of events following an initial crash in Pinetown. While trying to move the truck after the accident, it appeared to lose control. He died after falling out of the truck which ploughed into several cars and a wall.A truck driver…

42 people in court for R56m police vehicle branding scam

Forty-two people have been implicated in a police car branding scam. Forty-two people have been arrested for their alleged involvement in a police vehicle branding scam. They face a range of charges including corruption, fraud, money laundering, theft and perjury.Of these, 22 are serving police members.Forty-two people are set to appear in the Pretoria Magistrate's Court on…

New research suggests that antibodies the immune system makes to fight the new coronavirus may only last a few months in people with mild illness, but that doesn’t mean protection also is gone or that it won’t be possible to develop an effective vaccine.

“Infection with this coronavirus does not necessarily generate lifetime immunity,” but antibodies are only part of the story, said Dr. Buddy Creech, an infectious disease specialist at Vanderbilt University. He had no role in the work, published Tuesday in the New England Journal of Medicine.

The immune system remembers how to make fresh antibodies if needed and other parts of it also can mount an attack, he said.

Antibodies are proteins that white blood cells called B cells make to bind to the virus and help eliminate it. The earliest ones are fairly crude but as infection goes on, the immune system becomes trained to focus its attack and to make more precise antibodies.

Dr. Otto Yang and others at the University of California, Los Angeles, measured these more precise antibodies in 30 patients diagnosed with COVID-19 and four housemates presumed to have the disease. Their average age was 43 and most had mild symptoms.

Researchers found that the antibodies had a half-life of 73 days, which means that half of them would be gone after that much time. It dovetails with a previous report from China also suggesting antibodies quickly fade.

CDC STUDY: INFECTIONS COULD BE HIGHER THAN REPORTED IN SOME STATES, CITIES

The results “call for caution regarding antibody-based `immunity passports,’ herd immunity, and perhaps vaccine durability,” the California authors write.

That’s true, Creech said, but other parts of the immune system also help confer protection. Besides churning out antibodies, B cells develop a memory so they know how to do that again if needed.

“They would get called into action very quickly when there’s a new exposure to the virus. It’s as if they lie dormant, just waiting,” he said.

Other white blood cells called T cells also are better able to attack the virus the next time they see it, Creech said.

Although circulating antibodies may not last long, what we need to know is if and how people remake antibodies if exposed to the coronavirus again and if they protect against another infection, Alison Criss, an immunologist at the University of Virginia, wrote in an email. “We also need to know if there is a protective T cell response” that reappears.

Vaccines, which provoke the immune system to make antibodies, might give longer-lasting protection than natural infection because they use purified versions of what stimulates that response, she noted.

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Creech agreed.

“This shouldn’t dissuade us from pursuing a vaccine,” he said. “Antibodies are only a part of the story.”

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City of Cape Town urges people to leave Kataza the baboon alone

Kataza the baboon. Facebook / Baboon Matters The City of Cape Town has asked the public not to feed a baboon that has relocated to Tokai. The baboon, known as Kataza or SK11, is slowly being integrated into the Tokai troop. Video footage, however, shows humans feeding Kataza. The City of Cape Town has requested that Kataza…

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City of Cape Town urges people to leave Kataza the baboon alone

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