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			 The World Health Organization on Feb. 1 declared the Zika virus 
			outbreak to be a global public health emergency, citing a "strongly 
			suspected" relationship between Zika infection in pregnancy and 
			microcephaly. 
			 
			Zika has not been proven to cause microcephaly in babies, but there 
			is growing evidence that suggests a link. The condition is defined 
			by unusually small heads that can result in developmental problems. 
			Brazil said it has confirmed more than 860 cases of microcephaly, 
			and considers most of them to be related to Zika infections in the 
			mothers. Brazil is investigating more than 4,200 additional 
			suspected cases of microcephaly. 
			 
			(Reporting by Ju-min Park; Editing by Richard Pullin) 
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