The head of the World Health Organization insisted on Monday it was "now or never" to strike a landmark global accord on tackling future pandemics, despite the United States withdrawing from negotiations.
WHO director-general Tedros Adhanom Ghebreyesus said no country could protect itself from the next pandemic on its own -- three days after US President Donald Trump's administration formally told the United Nations health agency it would play no further part in the pandemic agreement talks.
