WHO says India has much to do on toxic cough syrup despite some progress

* WHO says 'work in progress' in India to stop cough syrup deaths * Medicines should be tested at every step, agency says * India plans to upgrade pharma facilities by year-end By Jennifer Rigby LONDON, Oct 21 (Reuters) – India has more work to do in halting sales of toxic cough syrup, despite some progress, a World Health Organization official told Reuters, after at least 24 children died following consumption of a domestically-made medicine. The children died after taking the Coldrif cough medicine made by Sresan Pharma, which tests showed contained the toxin diethylene glycol in quantities nearly 500 times the permissible limit. They came just two years after global pledges to tighten the system following the deaths of at least 300 children around the world linked to similar toxins in s