Transcript for Russia announces approval for COVID-19 vaccine
That's in a bit but right to the breaking news in the international race for a covid-19 vaccine. This morning Russia making that major announcement approving the first coronavirus vaccine in the world. Ian Pannell is in London, has the latest for us. Good morning, Ian. Reporter: Yeah, good morning, robin. That's right. A major declaration from the Russians saying they'll start mass vaccination by October. President Putin even saying one of his daughters has already been given this vaccine they're named sputnik, a nod to their first in the space race during the cold war. It's too early to declare victory in the hunt for a vaccine right now. Breaking news in the race for a covid-19 vaccine. Russia just announcing they approved the first vaccine in the world and will start administering it in days despite heavy criticism it hasn't been properly tested. We expect registration of the first covid vaccine in the world and believe it is an important step. Reporter: The vaccine said to be based on the same technology that helped them previously create an ebola vaccine and go to key workers like teachers and medics first. President Putin claiming it's passed all necessary testing but many scientists inside and outside Russia concerned over what they see as a hasty approach with just a small number of volunteers and Russia declaring victory before finishing its final stage 3 trials. I think in the United States we would demand a much bigger trial to be confident the vaccine was safe in the sense it didn't have an uncommon side effect and effective in the short term. Reporter: All this as oxford, moderna and pfizer are moving forward with phase 3 trial with 30,000 volunteers. U.S. Health experts optimistic. Speaking to ABC news Dr. Anthony Fauci says he's hopeful that a vaccine will show to be effective in trials and authorized by the fda within months possibly as soon as the end of the year. I believe there's quite a good chance that we will and that should take probably by the end of this calendar year with vaccine available as we go into 2021. Reporter: Well, U.S. Operation warp speed is putting billions of dollars behind vaccinemakers so the companies can ramp up production and run clinical trials at the same U.S. Regulators are insistent that there will be no corners cut when it comes to testing and that is the key difference between what America is doing and what the Russians have just announced. Ian, thank you so much.
This transcript has been automatically generated and may not be 100% accurate.