Medicine: The Wayward Virus

When Captain Edward A. Tappe boarded his Capital Airlines DC-4 at Washington's National Airport one afternoon last week for a no-passenger flight to Baltimore, he saw a pink puddle on the rug between the forward luggage compartments. Thinking it might be hydraulic fluid, he put his finger in it, put the finger to his nose, and sniffed. It was not hydraulic fluid so he wiped his finger on his uniform and forgot about it.

At Baltimore, as 22 passengers for Pittsburgh lined up to go aboard, a baggage crew unloading the plane saw pink fluid dripping from a cardboard carton marked in...