ZURICH (Reuters) – The head of the World Health Organization said on Saturday he had discussed with Chinese Premier Li Keqiang the need for stronger collaboration on the origins of COVID-19, a subject of controversy that has strained Beijing’s relations with the West. Tedros Adhanom Ghebreyesus has previously pressed China to be more forthcoming with data and information related to the origin of the virus. “Pleased to meet with Premier Li Keqiang,” Tedros tweeted. “We discussed COVID-19 and the need for an aggressive effort on VaccinEquity this year to vaccinate 70% of all populations,” he sai…