The UK National Health Service has pushed the window for people to receive a second dose of the COVID-19 vaccine made by Pfizer and BioNotech for the duration tested on only a few percent of patients.
The NHS has written a letter to hospitals stating that those who are scheduled to receive their second dose after January 4 should be rescheduled from three weeks to 12, with most recipients deadline. Are booked in the last week of. The move will bring the window closer to the deadline for the just-approved vaccine made by Oxford University and pharmaceutical company AstraZeneca AZN.
Read: Following the authorization of the AstraZeneca-Oxford Kovid-19 vaccine, Britain now has enough vaccines to cover the entire population.
The NHS said the move would protect the most at-risk people in the least amount of time and would have the greatest impact on mortality.
Confirmed coronovirus cases have increased over the past month, with the UK stating that there is a new version of the virus that causes COVID-19 and is more easily transmitted. On 30 December, daily cases have climbed to 50,023 since the end of 12,330 November.
When the UK’s Medicines and Healthcare Products Regulatory Agency gave its emergency approval for the vaccine from US pharmaceutical company Pfizer PFE,
And its German partner BNTT,
It states that the interval between doses should be at least three weeks, and is based on analyzes that included patients who received their second vaccination within 19 to 42 days of their vaccination.
Pfizer said the vaccine’s safety and efficacy have not been tested at new intervals. The COVID-19 vaccine for Phase 3 studies of Pfizer and Biotech was designed to evaluate the vaccine’s safety and efficacy after a 2-dose schedule, which was set aside for 21 days. The safety and efficacy of the vaccine has not been evaluated on a separate dosing schedule because the majority of trial participants received a second dose within the window specified in the study design, ”the company stated.
Pfizer also noted that there is no data to demonstrate that protection remains intact after 21 days from receiving the first dose.
“While decisions on alternative doses remain with health officials, Pfizer believes it is important health officials make efforts to monitor any alternative programs implemented and to ensure that every recipient receives the maximum possible protection. Is provided, meaning vaccination with two doses of vaccine. ” Pfizer said. Messages left with BioNTech were not immediately returned.
In pharmaceutical companies’ briefing document provided to the US Food and Drug Administration, they stated that 80% of patients received the second dose, the first one being administered within 10 weeks of receiving it.