The UK Health Security Agency’s study found that two weeks after using the booster dose of the Pfizer vaccine, those who were first given the AstraZeneca vaccine had 93.1% protection against symptomatic disease.
Similarly, the efficacy of booster dose was found to be 94% in those who used two doses of Pfizer vaccine.
It should be noted that various medical research reports have found that the effectiveness of 2 doses of the vaccine against the symptomatic disease decreases over time.
Dr. Marie Ramsey, head of immunization at the UK Health Security Agency, said the study results showed that booster doses could protect against symptomatic disease in people at serious risk of covid19.
“We know that protection from the first two doses of the vaccine in the elderly is declining over time, which is why millions of people need extra protection as winter approaches,” he said.
That’s why people should come forward for booster doses to prevent hospital admissions and mortality during the winter, he said.
The results of this study have not yet been published in any medical journal but have been published on the British Government’s website.
