Source: South China Morning PostFresh Covid-19 outbreaks show the virus will spread once the world is less vigilant about the pandemic, while slow global vaccine roll-outs risk more variants emerging, a Chinese infectious disease specialist has warned.“Most of the world has not yet been vaccinated. Even in countries with abundant supplies, the vaccination rate might hardly reach herd immunity level that can effectively block transmission,” wrote Zhang Wenhong, the head of Shanghai’s Covid-19 clinical team, on the Chinese…Read More