WHO chief Dr Tedros Adhanom Ghebreyesus said the number of cases outside China had increased 13-fold over the past two weeks. He said he was "deeply concerned" by "alarming levels of inaction" over the virus. A pandemic is a disease that is spreading in multiple countries around the world at the same time. However, Dr Tedros said that calling the outbreak a pandemic did not mean the WHO was changing its advice about what countries should do.
