Pfizer boss Albert Bourla said he isn’t yet concerned about a widening monkeypox outbreak after confirmation of the first stateside case triggered alarm bells this week.

Bourla, who helmed the pharmaceutical giant throughout its development of the Pfizer-BioNTech COVID-19 vaccine, said Wednesday the monkeypox data he has seen thus far is not cause for panic.

“I don’t have all the information ahead of me. With everything I know, I wouldn’t worry much,” Bourla said during an interview with CNBC at the World Economic Forum in Davos.