IF WHAT TRUMP CLAIMED IS TRUE THAT US IS THE MAJOR CONTRIBUTOR TO WHO , THEN WHY IS WHO NOT LISTENING TO HIS INSTRUCTIONS AND OBEYING HIM? CHINA BEING A SMALLER CONTRIBUTOR CANNOT POSSIBLY INFLUENCE WHO TO GO AGAINST TRUMP WHEN THE BIGGER CONTRIBUTOR CALLS THE SHOTS . IN THIS INSTANCE WHO IS SEEN TO BE IMPARTIAL , IT DOES NOT MEAN BIG CONTRIBUTOR IS ALWAYS RIGHT AND WHO MUST OBEY . AT LEAST IT SHOWS WHO HAS BACKBONE AND WILL NOT COMPROMISE IF THEY KNOW TRUMP IS WRONG AND UNREASONABLE.
It simple. Once they cut ties, there will be no pressure for USA to accept independent investigation led by WHO. More than 100 countries had signed the agreement including EU and China but USA didn't.