Eradicating Polio

Whether science can eradicate the polio virus. The World Health Organisation has set itself a target of eradicating the polio virus from the planet by 2000. But do scientists know enough to do this? Also in the programme a look at how lead exposure in the womb can rot your teeth and an insight into mosquito man Ronald Ross 100 years after he proved the cause of malaria. Presenter: Martin Redfern.