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June 05, 2023

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MONDAY, JUNE 05, 2023
China's Walvax to make Covid-19 vaccine candidate similar to AstraZeneca's

Coronavirus chronicle

Reuters
27 December, 2020, 04:15 pm
Last modified: 27 December, 2020, 04:18 pm

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China's Walvax to make Covid-19 vaccine candidate similar to AstraZeneca's

Mass production for the proposed vaccine could begin in mid-2021, with an estimated capacity of 200 million doses a year

Reuters
27 December, 2020, 04:15 pm
Last modified: 27 December, 2020, 04:18 pm
File Photo of 19 coronavirus vaccine/Reuters
File Photo of 19 coronavirus vaccine/Reuters

China's Walvax Biotechnology Co has started work on a plant to manufacture an early-stage coronavirus vaccine candidate similar to AstraZeneca PLC's product, state-backed media said on Sunday.

Mass production for the proposed vaccine could begin in mid-2021, with an estimated capacity of 200 million doses a year, said Health Times, a paper run by the People's Daily.

The treatment is based on a chimpanzee adenovirus to deliver materials that can trigger an immune response against the virus that causes Covid-19, a technique adopted in the candidate from AstraZeneca and Oxford University.

The Chinese candidate, jointly developed by China's Tsinghua University and Tianjin Medical University, has not been tested on humans. The AstraZeneca-Oxford treatment is in final-stage large trials.

AstraZeneca's late-stage trials in Britain and Brazil last month found an efficacy of 62% for trial participants given two full doses but 90% for a subgroup given a half, then a full dose. A Reuters investigation this week revealed problems with the Oxford/AstraZeneca vaccine study.

Adenovirus is used in other Covid-19 vaccine candidates, including one from China's CanSino Biologics Inc, which is based a harmless common cold virus known as adenovirus type-5 (Ad5).

Researchers on the CanSino vaccine have said it might be weaker in people who had been exposed to Ad5 and have pre-existing immunity against the adenovirus.

The potential Walvax vaccine might avoid this problem by using a rare adenovirus from chimpanzees to which humans normally do not have pre-existing immunity, Health Times said.

Walvax has another production facility in the works for a vaccine it is jointly developing with the Academy of Military Science and Suzhou Abogen Biosciences Co, which is in early-stage clinical trials.

China has moved at least five vaccine candidates into late-stage clinical trials.

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covid-19 vaccine / Walvax

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