Out of 8 companies, just 3 vaccines are in final stage of trials

Pfizer said that it might know next month if its vaccine is safe and effective while Moderna says it could have its vaccine by November as AstraZeneca’s U.S. trial is still on hold.
3:08 | 09/18/20

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Transcript for Out of 8 companies, just 3 vaccines are in final stage of trials
Of course, Jon, you know, all of this comes as the U.S. Now nears that new and grim milestone, the death toll nearing 200,000. Now at more than 197,000 lives lost. New York City schools suffering another setback tonight, and this evening, a reality check right here. Our team reaching out to the heads of all of the major vaccine trials, amid this political battle, this back and forth between the president and the scientists. So, what do they say about when a vaccine could come? What they told us tonight. Here's our chief national affairs correspondent Tom llamas now. Reporter: Tonight, a major reality check in the race for the vaccine. Of the eight companies in operation warp speed, just three vaccines are in the final stage of trials. And only one, pfizer, says it might know next month if its vaccine is safe and effective. We have quite a good sense, more than 60%, that we will know if the product works or not by the end of October. Of course, that doesn't mean it works, it means that we will know if it works. Reporter: Moderna telling us they could have an answer on their vaccine by November. But astrazeneca's U.S. Trial is still on hold, waiting for a green light from the fda after a British vaccine volunteer was hospitalized. The fight to get the upper hand on the virus coming as schools wrestle with reopening. And tonight, for parents in the country's largest school district, whiplash. Just days before reopening, New York City announcing yet another delay for most students. We need to make sure there's the appropriate number of educators in each school. Reporter: The mayor also citing a teacher shortage after another showdown with unions representing faculty and staff. I feel like the parents and the students are in between the mayor and the D.O.E. And I feel like we also are losing out. I mean, I understand that they're trying to make us safe, but we have to get into a routine. We need to move forward. Reporter: Some teachers are calling for more staff and ppe. At ps-532 in Brooklyn, we met teacher Sheri Bailey last month as her school was getting ready to reopen. Every day we have two jobs, to keep students safe and to keep them learning. And now safety is more important than ever. Reporter: Out west, some troubling news. Wynn resorts in Las Vegas reporting nearly 500 workers tested positive for the virus since the hotel and casino reopened in June. The company says contact tracing found nearly all the cases were contracted outside of work. And in Idaho, a pastor who told congregants they could go without masks after reopening for services has been hospitalized with the virus in the icu. Let's get to Tom llamas tonight. I mentioned at the top, there's some new polling, what the American people think of all of this, whether they trust this vaccine, will it be safe, if political pressure is actually rushing it? Reporter: That's right, and what we're learning tonight from this new survey from the pew research center, is that there is real concern. Only 51% of Americans will definitely or probably take the vaccine. That's down from 72% in may and more than three-quarters say they have real concerns if this vaccine is being rushed and if it will be safe and effective. David?

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