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Longer COVID Immunity For Up To Eight Months

Great news which gives real hope for vaccine developers

Amid speculations about the body’s immune response in Covid-19 recovered patients, new research has claimed that the recovered patients have antibodies to fight the disease for up to eight months — giving hope for the vaccine makers in India as the jabs may also be proven effective for a longer period, health experts said.

Till date, the common perception among the health fraternity was that the protective immunity is usually seen for three to five months, and then starts waning off.

“This is great news as it gives real hope for vaccine developers,” Sandeep Nayar, Senior Director and HOD, Chest and Respiratory Disease at BLK Hospital in west Delhi, told IANS.

“We hope that once a vaccine or vaccines are developed, these will provide long-term protection against this dreaded disease,” he added.

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The researchers of the new study, including Alessandro Sette, a professor at La Jolla Institute for Immunology in the US, measured antibodies, memory B cells, helper T cells and killer T cells, all at the same time from blood samples of Covid-19 recovered patients.

They found that responses to the novel coronavirus, SARS-CoV-2, from all major players in the “adaptive” immune system, which learns to fight specific pathogens, could last for at least eight months after the onset of symptoms from the initial infection.

“Because of the T cell-mediated immunity, the antibodies can produce memory B cells which may provide immunity against Covid-19, particularly in serious cases,” said Neha Gupta, Infectious Diseases Specialist at Medanta – The Medicity.

COVID Immunity
Covid-19 survivors have the immune cells necessary to fight re-infection. Pixabay

“As we gain more experience with Covid-19 virus recovery and able to monitor antibody levels over a prolonged period of time, we may see that the immunity may stay more than 6 months and, in some case, may extend up to one year,” Praveen Gupta, Director and Head, Neurology, Fortis Memorial Research Institute, Gurugram told IANS.

Want to read more in Hindi? Checkout: अमेरिका में बढ़ रहा है अमीर-गरीब के बीच का फासला , जाने क्यों ?

The findings help clarify some Covid-19 concerning data from other labs, which showed a dramatic drop-off of Covid-fighting antibodies in months following the infection, according to new research published in the prestigious journal Science.

According to the researchers, nearly all Covid-19 survivors have the immune cells necessary to fight re-infection.

“The vaccine studies are at the initial stages and so far, have been associated with strong protection. We are hopeful that a similar pattern of responses lasting over time will also emerge for the vaccine-induced responses,” said study co-author Daniela Weiskopf.

In India, as the Covid-19 infections currently affect 0.7 per cent of the population and are concentrated in a few cities and states, we may not have acquired larger herd immunity from the disease.

ALSO READ: Covid-19 Vaccines Less Effective For People Suffering From Obesity

“However, noting the fact that Covid-19 has not spread and caused much mortality in our country, it means that we may have better immunity against Covid-19 than many developed countries,” said Gupta. (IANS)



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