BioNTech and Pfizer's coronavirus vaccine shows potential in human trial
It's the fourth early-stage COVID-19 drug to show promise in human testing
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FRANKFURT (Reuters) - A COVID-19 vaccine developed by German biotech firm BioNTech and U.S. pharmaceutical giant Pfizer has shown potential and was found to be well tolerated in early-stage human trials, the companies said on Wednesday.
The drug is one of 17 being tested on humans in a frantic global race to find a vaccine the world is counting on to end a pandemic that has infected 10.5 million people and killed more than half a million so far.
The potential treatment is the fourth early-stage COVID-19 drug to show promise in human testing, along with projects involving Moderna, CanSino Biologics and Inovio Pharmaceuticals.
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BioNTech said testing of two dosages of its BNT162b1 drug on 24 healthy volunteers showed that after 28 days they had developed higher levels of COVID-19 antibodies than typically seen in infected people.
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The higher of the two doses - both administered via two injections within three weeks of one another - was followed by a short fever in three out of four participants after the second shot.
A third dosage, tested at a higher concentration in a separate group, was not repeated after the first shot because of injection pain.
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"These first trial results show that the vaccine yields immune activity and causes a strong immune response," said BioNTech's co-founder and Chief Executive Officer Ugur Sahin.
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He said larger trials were being prepared to show whether this translates into protection against a real infection.
No COVID-19 vaccine has been approved for commercial use. A Massachusetts Institute of Technology analysis last year found that about one in three vaccines in the first stage of testing later gains approval.
BioNTech, which listed on the U.S. Nasdaq in October, said the data demonstrated that BNT162b1 could be administered in a dose that was well tolerated with only temporary side effects.
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Early-stage human trials of vaccines are designed to measure certain antibodies and other immune markers in the blood as an indicator of the body's readiness to fight an infection that then requires further validation.
The pharmaceutical industry is eager to launch larger follow-up trials to see how vaccinated participants react to real infections over longer periods.
BioNTech and Pfizer will now pick the most promising of four experimental vaccines for a trial involving up to 30,000 healthy participants, which is likely to begin in the United States and Europe in late July, if it gets the regulatory green light.
If it eventually gets marketing approval, the companies are gearing up to make up to 100 million doses by the end of 2020 and another 1.2 billion doses by the end of 2021 at sites in Germany and the United States.
Results from early-stage testing of BioNTech's three other potential vaccines have yet to be published.
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The manuscript with the preliminary data from the clinical trials, which were launched in April and May, is under peer review for publication in a scientific journal, BioNTech said.
Singapore's state investment fund Temasek and other investors said on Monday there were investing $250 million into BioNTech for a 1.1% stake in company.
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(Reporting by Ludwig Burger and Patricia Weiss; Editing by David Clarke)