An agent wearing a protective mask opens the maintenance centre exit track for a Ouigo TGV that will go to Paris Gare de Lyon for a day of active service. The Ouigo are usually filthy, because of a very intensive utilisation rate. But now they are surprisingly clean, as extra care is given to inside and outside cleanliness, including thorough disinfection between trips. This is for avoiding coronavirus infection and more importantly to reassure passengers. There is much more time to do this work given that very few trains are running.
In addition, the Ouigo are the highest density TGVs in terms of capacity. They have more seats than other TGVs. Due to the pandemic, SNCF can allow only a maximul of 50% capacity so that passengers can keep safe social distancing. And 50% seats in a Ouigo means a bit more passengers than in other doubledeck TGVs, hence a little bit more revenues and profitability per train. I guess this is why so many Ouigo are in operation at the end of the lockdown period where the TGV traffic was reduced to 7%.