] Reuven Cohen of Bar-Ilan University in Israel and his
] colleagues propose a simple modification of random
] vaccination that is more effective, according to their
] computer simulations. The idea is to randomly choose,
] say, 20% of the individuals and ask them to name one
] acquaintance; then vaccinate those acquaintances.
] Potential super-spreaders have such a large number of
] acquaintances that they are very likely to be named at
] least once, the researchers found. On the other hand, the
] super-spreaders are so few in number that the random 20%
] of individuals is unlikely to include many of them.