China us testing an unusual COVID-19 vaccine - a recombinant (genetically engineered) vaccine based on insect cells, TASS reported.

The vaccine was developed at Sichuan University, and its staff has already tested it in monkeys and other animals.

No serious side effects are known to date. Although the results of testing have not yet been released, the capacity to produce at least 100 million kits per year has already been prepared.

Official government agencies have approved the start of clinical trials of this vaccine.

The University of Washington School of Medicine also presented its vaccine. It can be administered in one dose through the nose. Tests of the drug in mice have shown that it is more effective in preventing infection in mammals susceptible to coronavirus than conventional injections.