The UK chief medical officers warned there could be a coronavirus vaccine shortage lasting months into the New Year when they came out last night on plans to delay the second dose of the bumps.
Officials have decided to widen the gap between the first and second vaccine doses from three weeks to twelve so they can use more doses to give more people a first push.
However, GPs have classified the guideline as "grossly unfair" as they now have to cancel appointments for patients hoping for their second dose.
And frustrated scientists have warned that there isn't enough evidence to prove that the vaccines work this way too.
But Professor Chris Whitty, England's chief medical officer, said in a letter with his colleagues in Scotland, Wales and Northern Ireland that a single dose could provide 70 percent protection, and it would be more effective than 95 cents per person protection in a larger number of people half as many.
Margaret Keenan, the first person in the world to receive a Covid-19 vaccine, received her second bump earlier this week.
But thousands of others across the UK will postpone their second appointments so the NHS can focus on providing more people with bumps.
According to the Department of Health, a total of 944,539 people across the UK had received the first dose of a Covid-19 vaccine by December 27.
The Hospital Consultants and Specialists Association (HCSA) warned of the "ill-conceived" plan to postpone the second dose and would keep many at-risk employees in suspense.
Margaret Keenan returned to the hospital this week to get her second round of the Covid-19 vaccine, but thousands of other patients are expected to reschedule their appointments as part of a new program to get more people to get their first dose
Around a million people have now received their first coronavirus vaccination, but UK chief medical officers have urged doctors to support "decisive action" to tackle the "pandemic that is widespread in our communities".
A joint statement from English Professor Chris Whitty and the CMOs of Scotland, Wales and Northern Ireland said the public would "understand" and "thank" them for a plan that would prioritize first shocks and delay re-vaccination for others.
When Safford Cordery, deputy general manager of NHS Providers, warned, "We are facing a very difficult New Year," Whitty suggested that the vaccine shortage could last for months.
In the joint letter to doctors across the country, Mr. Whitty's bottlenecks are "a reality one cannot wish for".
The letter was published following comments from Paul Donaldson, general secretary of the Hospital Consultants and Specialists Association (HCSA).
Chris Whitty, Chief Medical Officer of England, said in a joint letter with CMOs from Scotland, Northern Ireland and Wales that vaccine shortages are "a reality one cannot wish for"
He said: “While a planned and orderly use of Oxford vaccination including longer deadlines makes epidemiological sense, the decision to throw a wrench into the work of the existing Pfizer rollout seems simply bizarre unless there is an unknown problem in the supply.
& # 39; We hear that vulnerable hospital doctors at high risk of Covid have been instructed not to show up for the second dose and are therefore not receiving full protection.
"You are now left in the balance by a hastily formulated policy that seems extremely ill-conceived."
Other health experts have stated that delaying the second dose will cause major problems for thousands of partially vaccinated elderly and vulnerable people.
Richard Vautrey, Chairman of the British Medical Association's GP Committee, said, “It is gross and obviously unfair to tens of thousands of our most vulnerable patients to try to reschedule their appointments now.
& # 39; The decision to ask general practitioners to rebook patients for three months at such short notice will therefore also cause enormous logistical problems for almost all vaccination centers and practices.
"For example, to get in touch with only 2,000 elderly or vulnerable patients, a team of five has to work in a practice for about a week, and that is simply untenable."
The launch of Oxford / AstraZeneca's newly approved vaccine begins on Monday, almost a month after the Pfizer / BioNTech vaccine launched. The second dose of both vaccines will now be given within 12 weeks instead of the 21 days originally planned.
In response to criticism from GP executives of the plan change, the joint statement said that although it was "difficult" to reschedule second impacts, it was better to give more people the "substantial protection" within two to three weeks. The UK is waiting for more vaccine supplies to become available.
Meanwhile, GPs are being offered £ 10 for every nursing home resident they vaccinate through an initiative by NHS England to reach the majority of top priority people by the end of January.
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