New research has shown that although Covid-19 vaccines reduce the risk of infection-related death and hospitalization, the Delta variant can be spread as quickly as the ones who are not vaccinated.
The study was conducted by Imperial College London in collaboration with the UK Health Security Agency. It has been published in The Lancet Infectious Diseases journal this week.
“Although vaccines remain highly effective at preventing severe disease and deaths from COVID-19, our findings suggest that vaccination is not sufficient to prevent transmission of the Delta variant in household settings with prolonged exposures,”The study concludes.
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Their analysis revealed that “densely sampled household contacts exposed to the Delta variant,”Research found Covid in 38% of people who were not vaccinated, and 25% among those who had been vaccinated.
The study found that vaccines work better to stop the spread of some variants like Alpha. It reduces the spread rate by about 40 to 50 percent.
The study also claims that the viral load, the amount of a virus in one’s body, is similar among the vaccinated and unvaccinated, though the virus dissipates quicker in vaccinated individuals, according to the findings.
“Fully vaccinated individuals with breakthrough infections have peak viral load similar to unvaccinated cases and can efficiently transmit infection in household settings, including to fully vaccinated contacts. Host–virus interactions early in infection may shape the entire viral trajectory,”The paper is as follows:
Public health officials warn that the Delta virus is the most dangerous and transmissible coronavirus variant, and can be spread by even those who have been vaccinated.
Researchers behind the Lancet study claimed ‘booster’ programs and approved vaccinations for younger individuals will help curb the spread of the virus going into the winter months, “but analysis suggests that direct protection of individuals at risk of severe outcomes, via vaccination and non-pharmacological interventions, will remain central to containing the burden of disease caused by the Delta variant.”
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Ajit Lalvani (co-lead for the study) and professor of infectious diseases at Imperial College London claims vaccines alone do not protect against the Delta variant. This new data supports this claim, but he encouraged those who aren’t vaccinated to still get immunized.
“Our findings show that vaccination alone is not enough to prevent people from being infected with the Delta variant and spreading it in household settings,”Lavlani stated.
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