patrick hsu. dr. marsha, let me talk to you first. yesterday to hear governor cuomo says they have done testing. the question is and this is what you are trying to get in this research. do you trust those numbers and these tests? >> these numbers are crucial for understanding this pandemic. there is now a wide variety of different tests coming in. they're showing up at people's doorsteps and there are different types of tests and each one have their own characteristics. we team up to ask basic questions, do these different tests give us reliable information. we decided to take a standard size of sample even people we know are infected with coronavirus or blood samples that were drawn before the outbreak going back to 2018 and before. just compare head to head and see how all the tests that are starting to become available before. do they give reliable information of a connection interpret. that's what we set out to do. >> if i am watching this at home and is it safe for me to go back to work, have i been exposed and do i have hopefull

bioengineer patrick hsu and his colleagues set out to see how many of those tests are accurate.ults so far are mixed. how would you characterize this? >> there are definitely some that are better than others. we see, out of the ten that we tested, i think three, the accuracy rates were 90% positive. >> reporter: the feinstein institute at northwell health is testing the acid reflux medication pepcid, also know as famotidine, to see if it blocks the virus from replicating. >> we don't know if taking famotidine causes more harm than good. we will be studying hundreds of patients who are hospitalized, receiving intravenous famotidine. >> reporter: researchers are currently studying whether that acid reflux medication can be used to treat the virus. right now there is no indication that it can. still, of course, doctors warn of the potential dangers of misusing medications, over the counter or prescription. bottom line: if you have a question about what to take and when to take it, ask your doctor. norah? >> o'donnell: thank you, mola. and today, thousands of small businesses hoping

bioengineer patrick hsu and his colleagues set out to see how many of those tests are accurate. results so far are mixed. how would you characterize this? >> there are definitely some re better than others.thers. we see out of the t we see out of the ten that we tested, i think three were 90% positive. >> reporter: the feinstein they are testing pepcid 20 see if it blocks the virus from replicating. >> we don't know if taking pepcid causes more >> we don't know if taking fantomodine causes more harm than good. we will be studying hundreds of patients who are hospitalized receiving intravenous fantomodine. >> reporter: researchers are testing whether that acid reflux medication can be used to treat the virus. right now there is no indication whether it can. doctors warn of the potential dangers of misusing medications, saer theerprtion. question about what to take and when to take it, ask your doctor. norah? >> o'donnell: thank you, mola. today, thousands of small businesses hoping for loans endured more delays and frustration-- the website crashed for a short time. this comes as