'Indonesia will be free of polio' is the promise repeated in hundreds of television advertisements and street banners across the country. Indonesia's Department of Health begins the second phase of its mass national immunisation programme against polio today in a scheme it says sets an example for developing nations in their long battle against the crippling disease. This round of the three-year scheme, known as PIN, aims to reach nearly 22 million children under the age of five across the country, the programme's secretariat said. Each year, the programme is conducted in two rounds. Last year more than 22 million children were immunised in the first round and more than 23 million in the second.