But a vaccine that works against the red blood cell stage, "even if only partially effective, would reduce the severity of the disease."

An all-in-one vaccine given at birth would greatly reduce this problem, experts said, even in economically advanced countries.

Some studies show that the vaccine does not reduce the risk of pneumonia in adults.

The vaccine reduced measles cases by more than 95 percent.

A successful vaccine could sharply reduce rates of cervical cancer, which affects 470,000 women a year worldwide and kills 225,000.

Current preventive vaccines reduce, but do not eliminate the chance of getting cervical cancer.

A successful vaccine could sharply reduce the rates of the cancer, which is a major cause of sickness and death among women worldwide.

In one large study in children, the vaccine reduced the chance of flu by 92 percent.

A universal vaccine could end that wait and also reduce the need for people to have vaccines each year against seasonal flu.

A new vaccine, says Rosen, will not just reduce disease and death - but also the burden of fear carried by many parents.