"The vaccine has progressed into animal testing in the US and, once we confirm it is safe and effective, will then be advanced into human trials,” says Professor Petrovsky, highly stressing that expectations shouldn’t be elevated until all testing is completed.

"The vaccine has progressed into animal testing in the US and, once we confirm it is safe and effective, will then be advanced into human trials,” says Professor Petrovsky, highly stressing that expectations shouldn’t be elevated until all testing is completed.