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  • AstraZeneca COVID-19...

AstraZeneca COVID-19 vaccine shows promise with two shots in Pig trial

Ruchika SharmaWritten by Ruchika Sharma Published On 2020-06-24T11:30:12+05:30  |  Updated On 24 Jun 2020 1:18 PM IST
AstraZeneca COVID-19 vaccine shows promise with two shots in Pig trial
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The ChAdOx1 nCoV-19 vaccine, also known as AZD1222, was originally developed by Oxford University scientists, who are now working with AstraZeneca on development and production.

UK: A trial in pigs of AstraZeneca's experimental COVID-19 vaccine has found that two doses of the shot produced a greater antibody response than a single dose.

Research released by Britain's Pirbright Institute found that giving an initial prime dose followed by a booster dose of the vaccine-elicited a stronger immune response than a single dose. This suggests a two-dose approach may be more effective in getting protection against COVID-19, the disease caused by the new coronavirus.

"The researchers saw a marked increase in neutralising antibodies, which bind to the virus in a way that blocks infection," the Pirbright team said in a statement. They added, however, that it is not yet known what level of immune response will be required to protect humans.

The ChAdOx1 nCoV-19 vaccine, also known as AZD1222, was originally developed by Oxford University scientists, who are now working with AstraZeneca on development and production.

"These results look encouraging that administering two injections … boosts antibody responses that can neutralise the virus, but it is the response in humans that's important," said Bryan Charleston, Pirbright's director.

AZD1222 is already in human trials, and AstraZeneca says it hopes to have data on efficacy later this year.

Preliminary data from a trial in six monkeys found that some of the monkeys given a single shot developed antibodies against the virus within 14 days, and all developed protective antibodies within 28 days.

More than 100 potential vaccines are being developed around the world to try to control the pandemic, which has already killed hundreds of thousands of people.

Stephen Griffin, an associate professor at Leeds University who was not directly involved in this work, said it was "an encouraging advance" and showed that "a so-called 'prime-boost' strategy gives rise to far better responses" than a single dose.

"Whilst these studies will need to be repeated within human subjects…this is a heartening study," he said.

Read also: AstraZeneca to supply 400 million doses of COVID-19 Vaccine to Europe


astrazenecaastrazeneca newscovid-19coronavirusazd1222chadox1 ncov-19 vaccine
Source : Reuters
Ruchika Sharma
Ruchika Sharma

    Ruchika Sharma joined Medical Dialogue as an Correspondent for the Business Section in 2019. She covers all the updates in the Pharmaceutical field, Policy, Insurance, Business Healthcare, Medical News, Health News, Pharma News, Healthcare and Investment. She has completed her B.Com from Delhi University and then pursued postgraduation in M.Com. She can be contacted at editorial@medicaldialogues.in Contact no. 011-43720751

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