The US Federal Bureau of Investigation (FBI) and the Cyber Security and Infrastructure Security Agency (CISA) have said in a statement that groups investigating Code 19 could be targeted by Chinese hackers.
The United Kingdom and the United States have already issued a detailed joint warning on May 5, calling for other countries to target the investigation.
He did not name anyone at the time, but sources said he was referring to China, Russia and Iran.
Now the United States has specifically named China in this new directive.
The United Kingdom has not yet backed the United States, and the new alert does not say what caused it.
This could mean that it is meant to please the American people as well as to increase pressure on China because there is already a lot of tension between the two countries.