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Special report. trumping democracy, an american coupe. this could be a step forward in the fight against covid. pfizer says the experimental pill reduces the risk of hospitalization, and death from the coronavirus by 89%. joining us now is cnn senior medical continue elizabeth cohn, this sounds significant, what do we know about this clinical trial? >> alisyn, it is significant. what's also significant is a pill by merck, an antiviral where results were announced a couple of weeks ago. these could be a game changer once people get covid. it's best to be vaccinated and not get covid. if you...

The two different numbers i've heard, have cast their ballots already, a 68% rise since 2014. that sounds significant. what does that tell us? >> that there's massive intensity on both sides. one thing strategists in both parties agree on. there will be massive turnout in states like texas. you're seeing more term turnout than the last midterm election. for democrats, that's good. they were counting on this influx of anti-trump voters to push them over the hill in florida and georgia, but until we count the votes we don't know, are these all democrats or have the republicans heard the presiden...

During the most recent protests. what do you make of the size of that number? it is far exceeding what any international observers expected. >> the government clamped down on external press coverage. we really don't know a lot about what happened. i believe given the extent of these demonstrations the clear explicit calls for the regime to be overthrown we have a real demonstration how unpopular and weak the regime is. what it has is the barrel of the gun. that's what sustains the islamic revolution. the militia and the guard corp. i think it's a moment in history we can see a regime change. i...

This is no evidence that ultra-sounds cause harm. they do have an affect on the baby's body. dr. manny alvarez for fox news health.com. doctor, this sounds significant. what is the potential risk for an unborn child? >> the risk of ultra-sound is minimal and the data shoes if you use ultra-sound in pregnancy. they may have 3 or 4 in the pregnancy cycle, but the fda, i think it is late for the game, you find them in malls and all over the country, you pay $300 and there is a technician and you spend an hour exposed to the the ultra-sound and they have no diagnostic. this is just images and ther...

Forever fluctuating in that area, but that sounds significant. david lee miller, thank you, for the update. bill: the other big story we are watching cuomes out of london. i don't know what time you got up but now they are officially husband and wife. they have been waiting and waiting for the rightnuptials. bill: now, the royal reception is coming up after the break, as the -- as kate -- almost called her the princess. allisyn: she is a princess. bill: duchess of cambridge. allisyn: we'll get -- we'll answer that, but, meanwhile, we will tell you what is happening on a much more serious note....