Sanjay Gupta

Now, it originated in Argentina, April 1st, making its way to the Antarctic, and then making its way north in the Atlantic.

And that's when it started to run into trouble.

people began to get sick.

And according to the World Health Organization, passengers fell ill between April 6th and April 28th.

Again, it departed April 1st.

People started to get sick between April 6th and April 28th.

Keep these dates in mind because they are relevant here.

The symptoms they had included fever, gastrointestinal symptoms, rapid progression to pneumonia, acute respiratory distress syndrome, and then shock.

And then as of this recording on Monday evening, there have been at least nine cases, seven confirmed and two probable of hantavirus infections from the ship.

Three passengers have died, including a couple from the Netherlands.

The man sadly died on board the ship on April 11th.

The wife then collapsed at an airport in South Africa as she was trying to fly home to the Netherlands.

She was taken to a nearby hospital and she died there.

Now, going back to those dates again, this couple was believed to have possibly been exposed before they boarded the ship.

A German woman then died on board the ship as well.

Her death is a confirmed hantavirus case.

And then again, as I mentioned, six additional confirmed or suspected cases among passengers and crew.

Here's a few things you need to know.

On April 24th, about 30 passengers, including seven from the United States, disembarked the ship in St.

Helena.