Coronavirus news highlights: The international team of 13 scientists examining the origins of the virus that causes COVID-19 arrived in Wuhan, China, today. The experts will begin their work immediately during the 2 weeks quarantine protocol for international travellers, the World Health Organisation said in a tweet. Two scientists are still in Singapore completing tests for COVID19. All team members had multiple negative PCR and antibody tests for COVID-19 in their home countries prior to travelling, it said. They were tested again in Singapore and were all negative for PCR. But two members tested positive for IgM antibodies. They are being retested for both IgM and IgG antibodies, the WHO said.