In this screen grab from video issued by Britain's Oxford University, a volunteer is injected with either an experimental COVID-19 vaccine or a comparison shot as part of the first human trials in the U.K. to test a potential vaccine, led by Oxford University in England on April 25, 2020. About 100 research groups around the world are pursuing vaccines against the coronavirus, with nearly a dozen in early stages of human trials or poised to start. (University of Oxford via AP)

An experimental coronavirus vaccine developed by a Chinese biotech became the first candidate to publish human data in a medical journal.
Researchers that tested CanSino Biologic’s vaccine in 108 volunteers in Wuhan, China, published their findings Friday in The Lancet, a top medical journal.
The scientists say the vaccine was well tolerated and that early data supports additional trials. CanSino’s vaccine is now being tested in a larger, mid-stage trial.
Nearly all volunteers developed some level of antibodies and T-cells, critical components of the immune system’s response to invading pathogens. But it’s not yet clear to scientists what levels of immune response are needed to protect people from infections.
About 4 in 5 participants had some level of side effects. Nine people developed severe fevers, although the researchers said all side-effects were self-resolving and lasted no more than two days.
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One of the leading coronavirus vaccine candidates showed signs of promise in an early human study that was primarily focused on safety.

The vaccine from CanSino Biologic was tested in 108 healthy volunteers at three dose strengths: low, medium and high. Researchers concluded it was tolerable and led to immune responses, supporting further clinical trials. The data was published Friday in The Lancet, a top medical journal.

It is the first published data to come from a coronavirus vaccine program. The Massachusetts biotech Moderna released a positive description of preliminary results earlier this week, but did not provide data or publish the information in a medical journal. Moderna executives said the data is in the hands of the US National Institutes of Health, which will release it at a later date.

Read more: We just got our first human results for a coronavirus vaccine. Here are the 5 biggest questions we still need answered about Moderna’s injection.

CanSino is a Chinese biotech that developed the vaccine candidate with the Beijing Institute of Biotechnology. Moderna and CanSino were the first vaccine programs to start human testing in mid-March. In April, CanSino advanced to mid-stage clinical trials after reviewing preliminary data from this initial study.

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The vast majority of participants — about 4 in 5 — registered some level of side effects, typically pain around the injection site (54% of participants reported), fever (46%), fatigue (44%), and headache (39%). Within a month of being vaccinated, none of the 108 volunteers had any serious adverse events, the researchers found.

Nine people did have “an episode of severe fever,” the researchers noted. Five of those people were in the high-dose group, which means 14% of the high-dose group suffered from severe fever. In total, 17% of the high-dose group had some form of severe side effect.

These were still self-resolving side effects, persisting for no more than 2 days following the injection, according to the findings.

While the study was primarily geared to see if the vaccine was safe in humans, researchers also measured antibody levels in the vaccinated volunteers. Antibodies are virus-fighting proteins that play a critical role in …read more

Source:: Business Insider


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