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Want to Get Along With Robots? Pretend They’re Animals

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How long does it take for a vaccine to become effective?

The Pfizer vaccine has been approved by authorities in the UK and will be given to Britons early next week. The first case of Covid-19 was confirmed in the UK on January 21 and now 316 days on and the end is in sight. But just how many days does it take for the coronavirus vaccine to become effective after it is delivered to a recipient?

The UK has made history and became the first country to approve the Pfizer/BioNTech Covid-19 vaccine for use.

The vaccine will be rolled out to patients from early next week.

The Pfizer vaccine has been shown to be around 95 percent effective and will be issued to Britons based on a priority list according to the Joint Committee on Vaccination and Immunisation (JCVI).

READ MORE: Pfizer Covid vaccine temperature: Why does it have to be -70C?

The Pfizer vaccine will be rolled out in phases, with most vaccinations for people in the at-risk population taking place between January and March or April according to Sir Simon Stevens, the chief executive of NHS England.

This will mean the adoption of the Pfizer vaccine will have “overwhelming benefit” according to Professor Pirmohamed.

Earlier on Wednesday, Professor Pirmohamed said: “The vaccine requires two doses 21 days apart and from that data presented to us people will be immune seven days after the second dose.

“Partial immunity does occur after the first dose and we can see some protection occurring after day 12 of the first dose.

“But the best immunity is seven days after the second dose.”

READ MORE: EU to wait almost a MONTH to approve Covid jab

He added independent regulators have been given “unprecedented access” to raw data, including clinical trials and manufacturing processes.

Professor Pirmohamed added: “From this, we can come to the conclusion that there is an overwhelming benefit for this particular vaccine and therefore recommended to the MHRA that its use should be authorised.

“The data showed that this vaccine is 95 percent effective.

“It is effective within all the groups who were given the vaccine in the trial irrespective of age, sex, race or country they lived in.”


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