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Babies in West and East Los Angeles and Inglewood are given an experimental measles vaccine.

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The experiment takes place in the context of one of the worst measles epidemics in many years between 1989-1991.

The Los Angeles County Health Department and Kaiser Permanente of California inoculate more than 1,500 six-month-old Black and Latinx babies with an experimental measles vaccine that was not yet approved.

The vaccine was previously tested on African and Mexican babies, and resulted in high death rates.