Question

Vaccination has proven to be a highly effective weapon against certain diseases. –, which at its peak in the 1940s and 1950s infected – in the United States each year, has been – eradicated worldwide through vaccination. Newly developed vaccines against diseases such as – hold great promise as a public health tool in Africa.

Answer 1

Answer:

Both in the Americas and worldwide, malaria is less of a problem than it once was. Place in chronological order the steps that were taken to fight it.

Explanation: