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Updated by Thomas Masterson on Jan 11, 2017
Headline for Don't Blame Zika, Alternative Theories for South American Birth Defects
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Don't Blame Zika, Alternative Theories for South American Birth Defects

While the Zika Virus pandemic is being blamed by many public health officials for the upsurge in cases of microcephaly, other theories exist.

Larvicide Manufactured By Sumitomo, Not Zika Virus, True Cause Of Brazil's Microcephaly Outbreak: Doctors

A group of Argentine physicians claim that the sudden microcephaly outbreak in Brazil was not driven by the Zika virus, but by a larvicide injected into the country's water supplies.

Pandora's box: how GM mosquitos could have caused Brazil's microcephaly disaster

In Brazil's microcephaly epidemic, one vital question remains unanswered: how did the Zika virus suddenly learn how to disrupt the development of human embryos? The answer may lie in a sequence of 'jumping DNA' used to engineer the virus's mosquito vector - and released into the wild four years ago in the precise area of Brazil where the microcephaly crisis is most acute.

Earlier microcephaly cases in Brazil raise doubts about link to Zika virus

Large numbers of babies with borderline normal heads were born Brazil as far back as 2012, two years before the Zika virus is thought to have entered the country, say researchers searching for answers to urgent questions.

Brazil, WHO officials deny pesticide-microcephaly link

Brazilian health officials and the World Health Organization deny links between a well-known pesticide, Pyriproxyfen, and microcephaly. They point to Zika.



In late 2014, the Ministry of Health of Brazil announced the introduction of the Tdap (Tetanus, diphtheria, and acellular pertussis) vaccine for all pregnant women in that country as part of its routine vaccination program. The move was aimed at trying to contain the resurgence of pertussis in Brazil. In December 2015, the Brazilian government…

Birth Defects in Brazil May Be Overreported Amid Zika Fears

After many false alarms, the government is considering tightening the guidelines establishing when health care providers should report infants born with abnormally small heads.

Conspiracy Theories About Zika Spread Through Brazil With the Virus

Rumors have replicated through social media and word of mouth, frustrating Brazilian officials as they grapple with a mysterious pathogen.