The medical scientist made important contributions to polio treatment and Australian environmental policy—despite substantial resistance.

Vaccine experts divided on whether that level of protection is too low or too demanding.

Accounting for a limited stockpile of cholera vaccine can provide insight into the most effective way to distribute future COVID-19 vaccines.

How an experimental preparation technique could make vaccines easier to transport, store, and administer

Microbiologist Maurice Hilleman foresaw the global spread of a novel influenza strain in 1957. His vaccine saved hundreds of thousands of lives.

A novel preparation technique could facilitate vaccine preservation, transportation, and administration.

There is no evidence that any of the coronavirus vaccines in development worsen a coronavirus infection rather than confer immunity to it, but the phenomenon is something scientists are closely monitoring.

Engineered Plasmodium parasites form the basis of two experimental malaria vaccines that showed safety and encouraging immune responses in clinical trials.

A clinical trial of the shot in eight volunteers suggests that it is safe and that it generates antibodies that neutralize SARS-CoV-2, but further testing is needed, scientists say.