CLEAN : After Coronavirus and quarantine AFP journalists tell their story

The transcript discusses the unique challenges faced by journalists covering an epidemic, describing it as dealing with an invisible enemy. It highlights the experience of witnessing a large city in China become a ghost town, which is unusual even during holidays. The local people's bravery and optimism are noted. The team plans to return to China to support their colleagues, acknowledging the need for another quarantine period.

What does the teacher mean by 'invisible enemy' in the context of the epidemic?

Describe the atmosphere of the city during the epidemic.