Singapore has confirmed 41 cases of locally transmitted Zika virus, mostly among foreign construction workers, and said it expected more cases to be identified.

All but seven of those infected have fully recovered, the health ministry and the National Environment Agency (NEA) said in a joint statement on Sunday. Those seven remain hospitalized.

On Saturday, authorities had confirmed a 47-year-old Malaysian woman living in southeastern Singapore as the city-state's first case of a local transmission of the virus — which in Brazil has been linked to a rare birth defect.