AG Trading Cards: Meet Kirsten

This is a very sad picture of Kirsten peeking in at her sick friend Marta on the front of a trading card.

The back of the card says:

During the riverboat journey on the Mississippi River, Marta became seriously ill. Kirsten went to see her in the ship's sick bay, or hospital.

Marta had:

1. cholera

2. measles

3. polio

Answer: 1

I think it is particularly poignant that Marta got sick and died after reaching the United States.
So meany people died on the way across the ocean, but danger did not cease after the ocean crossing.