Which factors contribute to outbreaks of measles after natural disasters?
1) contamination of drinking water with untreated sewage
2) lack of effective vaccination coverage in the population before the disaster
3) people living in overcrowded accommodation
1 )
1, 2 and 3
2 )
1 and 2 only
3 )
1 and 3 only
2 and 3 only
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