NY:A leading candidate of Covid-19 vaccine developed by global healthcare company Johnson & Johnson raised neutralising antibodies and robustly protected monkeys against SARS-CoV-2, the virus that causes Covid-19.
This means that after the registration one more clinical study of the vaccine will be conducted on 1,600 people.
Stoffels said prior tests of this type of vaccine in other diseases found that a second shot significantly increases protection.
In the monkey study, scientists from J&J and Harvard's Beth Israel Deaconess Medical Center studied seven different potential vaccines in 32 animals and compared the results to 20 control animals who got placebo shots.
The head of the Russian Direct Investment Fund, Kirill Dmitriev, has likened what he said was Russia's success in developing a vaccine to the Soviet Union's 1957 launch of Sputnik 1, the world's first satellite.
Six weeks later, all of the animals were exposed to the SARS-CoV-2 virus.
The trial began at Rana Hospital and Trauma Centre, which is among the 12 institutes selected for clinical trials of the vaccine.
Russian Federation is behind other developing vaccines that are in the third phase of their trials, as they will complete their second phase on August 3, and the third phase will be running when the medical workers are vaccinated.
All 20 animals that received the sham vaccine became infected and showed high levels of virus in their lungs and nasal swabs.
However, Russia is yet to release the scientific data on its coronavirus vaccine trials, hence, questions remain about the safety and efficacy of the vaccine, said the report.
Moreover, neutralizing antibody responses correlated with protection, suggesting that this biomarker will be useful in the clinical development of COVID-19 vaccines for use in humans.
Pending clinical trial outcomes, the vaccine is on track to start a phase 3 efficacy trial in 30,000 participants in September.
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