Pfizer's study results were similar to the findings from Israel. Further analysis is needed to determine the effect of vaccines on the delta variant.
Israel's health ministry released the data, which showed that the effectiveness of the Pfizer/BioNTech COVID-19 vaccine has decreased to 64 percent. Pfizer said that their own studies corroborate the findings from Israel and hence recommend a booster dose. The company said the booster shot would increase the potency of the vaccine by five to ten folds.
However, experts said that it is too early to decide that the vaccine is ineffective based on a single stand-alone study. The data presented hasn’t been peer-reviewed and did not contain enough information. Further studies conducted in Britain, Scotland, and Canada have shown that Pfizer is 80 to 88 percent effective against the Delta variant.
A recent study conducted in France revealed that 95 percent of people retained sufficient antibodies to thwart the virus. The analysis showed that though the delta variant has mutations that can evade some of the neutralizing antibodies produced by vaccines, it still offers significant protection in those who have been fully vaccinated.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19, including symptoms, prevention, and available treatment, please refer to the World Health Organization or your national healthcare authority.