90-Second Read: Should you be worried about Hantavirus? A Hopkins doctor shares insights

A Hopkins doctor shared insights on Hantavirus as two Marylanders are being monitored for potential exposure. A doctor with Johns Hopkins Medicine shared some insights on the spread of Hantavirus. Three people have died out of the roughly 11 cases reported by the World Health Organization. It comes a day after Maryland health department officials said they're monitoring two Marylanders who were possibly exposed to a cruise passenger.

What to know about the outbreak "If they stayed longer on the ship, the situation could have been difficult," said Tedros Adhanom Ghebreyesus, director-general of WHO. Sood said quarantine, which could last up to 42 days with Hantavirus, is really only necessary if the virus is highly transmissible. Given the long incubation period, we're right at the time where we're going to be identifying cases.

We know about the transmission of Andes virus mostly through reports from South America where we've seen it. So, we don't have a huge number of outbreaks or a huge number of data points to be able to say exactly what are the conditions that are necessary for transmission. What we do know is that it doesn't transmit the way something like measles does, where if you walk into a room where somebody with measles was, even an hour after they were there, you can still get infected. If we start seeing secondary spread, if we start seeing people who were exposed outside of the cruise ship or who were not exposed to the cruise ship at that point, that would be concerning.