When and how to use the existing tests to detect SARS-CoV-2 virus
“Test, test, test.” This is how Tedros Adhanom , director general of the World Health Organization (WHO), urged the countries at the beginning of the covid-19 pandemic. Testing, isolation and contact tracing should be – and have been in many cases – the “backbone of the global response” to the crisis, according to the head of the agency. According to experts,