1979 is last natural case of this disease in the U. S

It is smallpox.

Explanation:

On December 9, 1979, a commission of scientists declare that smallpox has been eradicated. The disease, which carries around a 30 percent chance of death for those who contract it, is the only infectious disease afflicting humans that have officially been eradicated.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v