"There are some very important information gaps that we are working with China to fill," said COVID-19 technical lead, Maria Van Kerkhove. COVID-19 infections in China have surged as the country began to lift its zero-COVID measures in December last year.

(Reporting by Raghav Mahobe in Bengaluru, Jennifer Rigby in London and Gabrielle Tetrault-Farber in Geneva; Editing by Peter Graff)