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Oxford COVID-19 vaccinologists: Impossible to achieve herd immunity
Oxford COVID-19 vaccinologists: Impossible to achieve herd immunity. The head of the Oxford Vaccine Group, which specializes in vaccines, said that the current Delta virus strain is “impossible” to achieve herd immunity.
The Guardian reported that the head of the Oxford Vaccine Group, Professor Andrew Pollard, provided evidence to members of Congress on the 10th that the fact that the vaccine did not prevent the spread of COVID-19 pneumonia meant that the previous “reached the overall immunity of the population.” The threshold is mythical imagination”.
Professor Pollard pointed out that “the problem with this virus is that it is not like measles. If 95% of people are vaccinated against measles, the virus will not spread among people, but the Delta virus strain will still infect people who have been vaccinated. It means that people who have not been vaccinated at any time may be infected with the virus, and we have nothing that can completely stop this spread.”
Although existing vaccines are very effective in preventing illness or death caused by severe new coronaviruses, they cannot prevent fully vaccinated people from contracting the new coronavirus. The concept of herd immunity relies on the vast majority of the population to gain immunity, whether through vaccination or infection.
Recent research data conducted by Imperial College London shows that compared with unvaccinated people, fully vaccinated people aged 18 to 64 have a 49% lower risk of infection. The survey results also show that people who are fully vaccinated are three times less likely to test positive after contact with a person infected with COVID-19, which means that the vaccine is still effective.
At present, the Secretary of Health of the United Kingdom, Sajid Javid, said on the 10th that he plans to provide COVID-19 booster vaccination to the most vulnerable groups in the UK from next month, but he is also the chairman of the Joint Committee on Vaccination and Immunization (JCVI).
Professor Ladd questioned whether there is such a need. He said that “even if the level of antibodies caused by the vaccine drops, people’s immune systems may remember to vaccinate for decades and provide a certain degree of protection when exposed to the virus” and emphasized that “so There is no reason to panic now, and we have not seen the problem of breakthrough serious diseases.”
(source:internet, reference only)