1940

• A team of researchers at the Rockefeller Institute discovers the Rh factor in blood.
• Rebecca Lancefield identifies streptococcus group A as the cause of rheumatic fever.
• The Rockefeller Foundation announces it will make a recently developed vaccine available to Britain to fight influenza in the war zone.
• On May 22, the Council of Foods of the American Medical Association (AMA) gives its first seal of approval to the Bird's Eye Corporation for its quick-frozen foods.
• In August, there are deadly outbreaks of polio in West Virginia and Indiana during the summer.
• On October 10, the medical faculty at Stockholm University announces it will not award the Nobel Prize for medicine in 1940 because of the ongoing war.
• On October 21, the Clinical College of the American College of Surgeons recommends a detailed plan for having doctors serve in the military without causing...