[tryp4vps]

That's true.I recently saw a review which saying "China and the U.S. are competing the vaccine developing speed though not widely reported" - this looks interesting.
It is undoubtful that the two countries are on a race - but why they compete on the vaccine?

For economic reasons I guess.

If one country wins the vaccine development race, then most other countries will purchase its vaccine as fast as possible, at any cost, almost.

So actually, not only the two countries, the U.S. and China are on the race. At least the U.K. and Russia are also on that race too.