Pfizer vaccine offers protection after the first dose: FDA

Pfizer vaccine offers protection after the first dose: FDA

Because the vaccines are new, Nakayama says people need to consider their long-term safety: "Researchers may not have found problems among tens of thousands of trial participants, but if more people are vaccinated there could be adverse reactions that lead to serious health problems".

The chief medical officers of England, Scotland, Wales and Northern Ireland said the vaccine would as a result only have a "marginal impact" on hospital numbers over the winter months.

Donning a blue "Merry Christmas" shirt with a penguin on it, Ms. Keenan said she felt "so privileged" to be first in line and looks forward to spending time with family in the new year.

Concerns about the availability of the vaccines come as Trump is to sign an executive order Tuesday to prioritize Americans for coronavirus vaccines procured by the federal government.

United States vaccine regulators on Tuesday released the most detailed look yet at Pfizer's coronavirus vaccine, outlining its safety and the side effects seen in a massive clinical trial. "In the past, a dengue vaccine proved effective in tests and was widely used, but then it worsened symptoms for people who were still getting infected".

"I do think that's a fluid situation", she said.

The first 800,000 doses will go to people over 80 who are either hospitalized or already have outpatient appointments scheduled, and nursing home workers.

British regulators authorized the use of Pfizer's COVID-19 vaccine last week. USA and European Union authorities are also reviewing the vaccine, alongside rival products developed by Moderna and by a collaboration between Oxford University and drugmaker AstraZeneca.

Canada could roll out its COVID-19 vaccine plan as early as next week, with the arrival of the first shipment of the Pfizer vaccine, Canadian Prime Minister Justin Trudeau said Monday.

The UK has been one of the countries hardest-hit by the pandemic, both in Europe and worldwide, recording over 61,000 deaths and 1.6 million cases. The government is targeting more than 25 million people, or about 40% of the population, in the first phase of its vaccination program, which gives first priority to those who are at highest risk from the disease. The group is expected to provide advice and recommendations around Ontario's COVID-19 vaccine rollout program.

Pfizer's vaccine is extremely delicate and must be stored at temperatures below -70 C, until shortly before it is administered.

Stephen Powis, medical director of the National Health Service, was on hand to witness the historic first injection. Moderna said it is on track to produce 500 million to 1 billion doses of its vaccine globally in 2021. Pfizer plans to offer patients who received the placebo a vaccine if it is covered by an emergency use authorization, but the FDA has urged companies to keep patients blinded and not offer placebo patients the vaccine for as long as possible. Governments around the world are making agreements with multiple developers to ensure they lock in delivery of the products that are ultimately approved for widespread use.

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