The WHO’s recent alert linking cough syrups manufactured by an Indian pharmaceutical firm to the deaths of 66 children in Gambia is “alarming” and there are some missing links that need to be “investigated”, an expert said on Saturday.

The World Health Organisation on Wednesday issued an alert, saying four “contaminated” and “substandard” cough syrups produced by Maiden Pharmaceuticals Limited could be the reason for the deaths in the West African nation.