. >>> hey, guys, welcome to "techknow", joined by dr ross shimabuku, and lindsay moran. microscopic things have been making news. viruses. take ebola - it caught america offguard. in some places we overreacted and in other places we doesn't do enough. >> there's a lot of scare around ebola, because we don't know much about it, compared to measles. which is also a hot topic. >> when we think of diseases we tend to think of containment. how do we contain them. i had an opportunity to meet a small group of scientists who are seeking out the pathogens in order to understand it. it might surprise people that metropolis. that's good reason for that. let's have a look. >> reporter: we are all vulnerable to the tiny viruses. >> microscopic agents causing big diseases. >> reporter: these infectious agents know now boundaries and in today's hyper connective world, they can move fast. like others, like small pox are eradicated. others spring back to life when we are not vigilantful. safety. >> more than 400 in mexico have contracted measles. >> reporter: then there are the new kids