"We continue to produce a safe and effective vaccine in the record time frame that has been talked about. We will receive it, in my opinion, by the end of the year. Perhaps even by the end of October," Trump said.
The US President added that Pfizer expects to receive test results for the drug in the coming weeks.
Other companies that are conducting large clinical trials include Moderna and AstraZeneca.
At the end of July, 139 vaccines in the world were at the stage of preclinical studies, and 25 are already being tested clinically, 6 of which are as close to practical use as possible and are at the 3rd stage of trials.
In particular, it was reported that the University of Cambridge intends to begin clinical trials of its vaccine against coronavirus in the fall after the British government provided funding of 1.9 million pounds.
And in early September, the World Health Organization said that a large-scale vaccination against Covid-19 will take place no earlier than mid-2021, since no vaccine has demonstrated at least 50% effectiveness.