which insurance scheme to opt for?

[visahunter]

Hi
I am planning to visit USA for few months. I have been asked to buy visitor health insurance. They said this "health coverage for entire period and medical evacuation and repatriation"
What does it mean ? What insurance should i opt for ??

[insubuy]

How old are you?

Do you have any health conditions?

What country are you applying the visa in?