Vaccination isn't a perfect defense against flu. But vaccines remain the most reliable way to reduce the risk from an illness that causes thousands of deaths in the U.S. during a typical flu season.
The passenger, who was taken off a flight after it landed in the Dominican Republic, reportedly coughed and then said: "I have Ebola. You're all screwed."
After an appeals court put Wisconsin's law back into effect, the Supreme Court's liberal wing, plus Justices Kennedy and Roberts, voted put the law on hold while they decide whether to take the case.