u"It's a bit like a travel agency. They want to go to a specific destination, so they have to do a PCR test and go through us," Ghassaine Ghouma laughs as he tests his young patient in a laboratory in Paris' upmarket neighbourhoods. As the summer holiday's approach, more and more people are coming to the laboratories to get PCR tests, which are essential to be able to travel abroad. IMAGES AND SOUNDBITES