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…showed last 75 words of 523 total…and basic health infrastructure make it difficult to carry out immunisation programs in some countries. In August 1998, for example, the Democratic Republic of Congo was forced to suspend its programme because of the ongoing fighting. But in other countries affected by war temporary ceasefires have been held so health workers can carry out immunisation programmes. Another problem, apparently in South Asia, is the population problem, as health workers find it difficult to contain the population.