In 1942, long before the vaccine was available, I contracted measles, went into a coma, but recovered. My younger brother and sister received transfusions of immune serum from our mother, who had had measles as a child, and were protected. My siblings were not the only ones to benefit from serum treatment: In 1970, two people working on Lassa fever at a university research lab caught the illness, and one died. The other was diagnosed in time, received immune serum from a Lassa survivor, and recovered.













