People in their 20s, 30s and 40s unaware they are infected are driving the spread of coronavirus, the World Health Organization (WHO) has warned.
The proportion of young people with Covid-19 has risen, officials said, putting the lives of those who are more vulnerable at risk if people socialise without realising they are carrying the virus.

"The epidemic is changing," the WHO Western Pacific regional director, Takeshi Kasai, also explained.
"What we are observing is not simply a resurgence. We believe it's a signal that we have entered a new phase of pandemic in the Asia-Pacific," he said.
Outbreaks have occured in recent weeks in countries like Vietnam where the virus had appeared to be under control.

Several European countries including France and Spain have seen case numbers rise significantly in the past two weeks, with some warning that young people are not following social distancing guidelines.