Permanent representatives of 48 countries have sent a letter to World Health Organisation (WHO) director-general Tedros Adhanom Ghebreyesus in support of studying the origins of Covid-19 but opposed any politicisation of the study.

The diplomats said Covid-19 is a common enemy of mankind which can only be defeated by solidarity and cooperation of the international community, the Xinhua news agency reported.

Cooperation on the study of the origins of Sars-CoV-2 is...