Covid Vaccine : FDA approves Pfizer vaccine for emergency use in US
The US Food and Drug Administration has authorised the Pfizer-BioNTech coronavirus vaccine for emergency use.The agency said the authorisation was a "significant milestone" in the pandemic, which taken more than 295,000 lives in the US.
The vaccine, which offers up to 95% protection against Covid-19, was deemed safe and effective by the FDA. visit er
President Donald Trump said the first vaccinations will take place "in less than 24 hours".
How does the vaccine work?
The Pfizer/BioNTech vaccine was the first coronavirus jab to show promising results in the latter stages of its testing process.
It is a new type called an mRNA vaccine that uses a tiny fragment of genetic code from the pandemic virus to teach the body how to fight Covid-19 and build immunity.
"The vaccine contains a small piece of the [Covid-19] virus's mRNA that instructs cells in the body to make the virus's distinctive 'spike' protein," the FDA said.
"When a person receives this vaccine, their body produces copies of the spike protein, which does not cause disease, but triggers the immune system to learn to react defensively, producing an immune response against [Covid-19]."
The vaccine is given as two injections, 21 days apart, with the second dose being a booster. Immunity begins to kick in after the first dose but reaches its full effect seven days after the second dose.
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