There were many imported cases in Yunnan Province on January 28th and 29th. These imported cases did not immediately lead to a change in the basic reproductive number.
On January 28 and 29, there were many imported cases () in Yunnan Province. These imported cases did not immediately lead to the change of basic regeneration number.
On January 28th and 29th, many imported cases () appeared in Yunnan Province, and these imported cases could not immediately lead to the change of the basic reproduction number.