Summary | The H1N1 flu virus has become the major influenza
strain in the city this winter and there has been a rise in the
number of cases this month, officials from the Shanghai Center
for Disease Control and Prevention (CDC) said yesterday.
strain in the city this winter and there has been a rise in the
number of cases this month, officials from the Shanghai Center
for Disease Control and Prevention (CDC) said yesterday.
china.org.cn | 18 December 2015