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China also controlled any information that was published about covid, and as he pointed out, destroyed some of the early samples of this virus, so can we ever really hope to get to the bottom of this? >> friends of all, what you said is absolutely correct. what we learn from this paper that was just put out, really just confirmatory in that it dispels the food market theory, which we kind of knew about. the circumstantial evidence is overwhelming, and at this point when i hear politicians foster...

That the virus had been circulating before it emerged out of the seafood market, so what does that tell us? >> thats right, so dr. blumer covered the sequences from a cloud server and did this analysis, the sort of very elaborate tracing and found that the strain early in the pandemic in wuhan was very different from what was recovered at the food market. the chinese have never returned over any of the earliest samples, so these are some of the best ways to trace where it came from, and it reall...

Subways tuna sandwich. this is kind of scary. no tuna dna was present in the sample, no amplification product so we cannot identify the species. this reporter went to multiple subway shops to get the samples and froze them. the time spot until 60 inches of subway tuna sandwiches from different places, subways facing a class action lawsuit. that was in january and the suit alleges the tuna sandwich is not made of tuna. those lawyers are happy. so what is it? jillian: is anyone said anything about...

Accounting for 20% of tested samples. lets get perspective from dr. paul offit at childrens hospital in philadelphia. i dont know if it was a week ago it was at 10% of cases in the u.s. were this delta variant. now its 20%. whats to stop this from becoming the dominant variant in this country as it has in other countries? >> well, vaccines are what stop it. unfortunately, we have a large percentage of the population that is still choosing not to vaccinate. i dont know why we need to keep learnin...

Eliminate covid-19. good news, the vaccines are effective against the delta variant. there is a danger, a real danger that if there is a persistence of a recalcitrance to getting vaccinated that you could see localized surges. >> dr. fauci added that this variant is doubling every two weeks in with the u.s., now accounting for about 20% of tested samples. lets get perspective from dr. paul offit at childrens hospital in philadelphia. dr. offit, i remember, i dont know if it was a week ago, a cou...

Dr. sanjay gupta has been reporting on that delta strain and has new reporting on this and joins me now. it was just a few percentage points and theyre saying its going to keep doubling and double, now were looking at they say 50% of covid infections in the united states in the next few weeks. dr. fauci says its already at 20% of the samples theyre even testing and poses the greatest threat out there right now. so how serious is this variant? >> well, this is lot more transmittable. we know this...

Thousands in federal grant money for studies at the wuhan lab. lucas tomlinson is following the story. tell us whats going on. >> he organized the statement from 27 scientists from february of last year calling the lab leak hypothesis a conspiracy theory. he has recused himself because of his past work at the lab in wuhan. he said this work includes the identification of viral sequences and bat samples and resulted in the coronavirus related reagents to test therapeutics and vaccines. he was par...

The university of missouri is working with the states health department to track covid-19 in wastewater. they pull wastewater from facilities like this one all across the state to try to see whether or not covid-19 is in communities. not only can they detect whether or not covid-19 is in wastewater, but they can tell which variants are there. this machine right here is the first step towards detecting covid-19 in wastewater. it pulls samples of wastewater, again, this is specific to each communi...

The delta variant in this wastewater in the state. they found that on may 10. within 48 hours give or take, they identified it here in brookfield again, in the wastewater they had been sampling. they are working with the state department to pull samples of wastewater facilities all across the state so they can see whats in the water. they use machines like this to first pull the samples of wastewater. that then gets sent over to columbia, missouri where the university is where scientists in labs...

University of missouri. they are having water treatment plants pull samples across the state. not only can they detect whether or not covid-19 is in wastewater and identify what communities are seeing an uptick in covid-19, but they can see what variants are there. they say that they are seeing the delta variant across this state. they are particularly finding it in smaller, more rural communities where the vaccination rate is really low. in this county, only a third of people are fully vaccinat...