Zika Infection Linked with Rare Joint Birth Defect

A small number of babies infected with Zika virus in the womb have developed a rare birth defect involving muscle weakness and stiff joints, according to a new report of the cases. The report suggests that this birth defect, called arthrogryposis, is linked with Zika virus infection in pregnancy, adding to the list of health problems tied to the virus. Infection with Zika virus in pregnancy has already been found to cause the birth defect microcephaly, which means a child has an abnormally small