Dozens of other teams around the world have potential vaccines in development.
But the Pittsburgh research is the first study on a Covid-19 vaccine candidate to be published after critique from fellow scientists at outside institutions.
The scientists were able to act quickly because they had already laid the groundwork during earlier epidemics of coronaviruses: Sars in 2003 and Mers in 2014.
“These two viruses, which are closely related to[Covid-19], teach us that a particular protein, called a spike protein, is important for inducing immunity against the virus. We knew exactly where to fight this new virus,” said Andrea Gambotto, associate professor of surgery at the Pittsburgh School of Medicine.
Vaccine developed by US researchers is injected by 400 ‘microneedles’ stuck onto the skin like a plaster.
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