AstraZeneca is seen as a bellwether for the pharmaceutical sector in China, which accounted for about 16% of the company's total revenue last year.
Sales in China have been hurt by lower drug prices while COVID lockdown measures have kept some patients from being diagnosed and seeking care.
Better-than-expected sales of AstraZeneca's cancer medicines, including Tagrisso, Imfinzi and Enhertu, helped the company's quarterly revenue beat, with sales of its broader oncology portfolio rising 24%.
But global sales of the company's COVID therapy, Evusheld, have steadily grown, partially offsetting the rapid decline in COVID vaccine sales.
Evusheld continues to demonstrate strong efficacy but there are a couple of variants that are resistant to it, Soriot said.