The BBC came across roadblocks and checkpoints as they tried to report on a decade-long project into viruses that bats carry

The World Health Organization is preparing to check out China following month, after being entrusted with exploring the beginnings of the Covid-19 infection.

In the meanwhile, the BBC has actually been to Yunnan district in the south of China where a decade-long job has actually been occurring to example the infections brought by bats.

But, as our China reporter John Sudworth records, the Chinese authorities seem much much less crazy about analysis.