The researchers, Danuta Skowronski and Gaston De Serres, said their findings were derived from Pfizer's documents submitted to the US Food and Drug Administration. Liam McBurney/Pool via REUTERS/File Photo
The researchers, Danuta Skowronski and Gaston De Serres, said their findings were derived from Pfizer's documents submitted to the US Food and Drug Administration. Liam McBurney/Pool via REUTERS/File Photo

Researchers urge delay in administering Pfizer vaccine's second dose

By Reuters Time of article published Feb 18, 2021

Share this article:

London - Researchers on Wednesday urged governments to delay administering the second dose of Pfizer's Covid-19 vaccine, which they said had an efficacy of 92.6% after the first dose.

The researchers, Danuta Skowronski and Gaston De Serres, said their findings were derived from Pfizer's documents submitted to the US Food and Drug Administration.

These findings were also similar to the first-dose efficacy of 92.1% reported for Moderna's mRNA-1273 vaccine, Skowronski and De Serres said in their letter published in the New England Journal of Medicine.

They cautioned that there may be uncertainty about the duration of protection with a single dose, but said that the administration of the second dose a month after the first provided "little added benefit in the short term".

"Given the current vaccine shortage, postponement of the second dose is a matter of national security that, if ignored, will certainly result in thousands of Covid-19–related hospitalizations and deaths this winter in the United States," the authors warned.

In its response, Pfizer said that alternative dosing regimens of its vaccine had not yet been evaluated and that the decision to do that resides with the health authorities.

"We at Pfizer believe that it is critical for health authorities to conduct surveillance on implemented alternative dosing schedules to ensure that vaccines provide the maximum possible protection," it added.

In the meantime, ANI reported that United Nations chief Antonio Guterres on Wednesday slammed the "wildly uneven and unfair" distribution of coronavirus vaccines and said that only 10 countries have administered 75% of all vaccinations and demanding a global effort to get all people in every nation inoculated as soon as possible.

According to a report by Al Jazeera, Guterres, while addressing a high-level meeting of the UN Security Council, said 130 countries have not received a single dose of vaccine.

"At this critical moment, vaccine equity is the biggest moral test before the global community," he said.

Share this article:

Related Articles