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بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی
بهترین سایت شرط بندی ایرانی

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

BCG vaccine helps fight infections by boosting immune cell production

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By Layal Liverpool

BCG vaccine in human blood cell

BCG vaccine (red, lower left) infecting a human white blood cell (green)

NIBSC/SCIENCE PHOTO LIBRARY

The BCG (Bacillus Calmette-Guérin) tuberculosis vaccine boosts the production of immune cells, which may explain why it can protect newborn babies from dying of sepsis.

Previous studies have shown that BCG vaccination can protect newborns against a broad range of infections beyond tuberculosis, reducing overall deaths from sepsis. But exactly how this works was unclear.

“Knowing the mechanism behind this effect will support the use of the BCG vaccine to prevent newborn sepsis,” says Nelly Amenyogbe at the Telethon Kids Institute in Perth, Australia. Amenyogbe and her colleagues analysed blood samples from 85 newborn babies in Gambia, Guinea-Bissau and Papua New Guinea, half of whom had been vaccinated.

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They found that, three days later, the newborns who had been vaccinated had about twice as many immune cells, called neutrophils, in their blood.

In another experiment, the researchers vaccinated newborn mice with BCG and then infected them with bacteria to induce sepsis. They also infected non-vaccinated mice. Just like the human babies, the mice that had been vaccinated produced about double the number of neutrophils, which then protected them from dying by gobbling up the bacteria that cause sepsis.

“There is increasingly strong evidence that BCG, a vaccine designed to work against tuberculosis, has advantageous non-specific effects against a range of pathogens in humans,” says Danika Hill at the Babraham Institute in Cambridge, UK.

With this in mind, the BCG vaccine is currently being trialled in people as potential protection against covid-19. But “whether BCG, and any potential effect on neutrophils, could be beneficial against [the coronavirus] is unclear and warrants careful consideration”, says Hill.

Amenyogbe says BCG also has effects on other parts of the immune system, beyond neutrophils, and it is possible that these other effects may provide some benefit against covid-19.

“If vaccines such as BCG are able to provide non-specific protection against newly emerging pathogens, this could be a game changer for managing covid-19 and any future pandemics,” says Hill.

Journal reference: Science Translational Medicine, DOI: 10.1126/scitranslmed.aax4517

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Hot Topics

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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