POLYTHEA – Design and photo-optimization of photosensitizers for human health and food security application – or « How light can save lives » – is a Marie Curie Innovative Training Network – European Joint Doctorate. 
It is a network gathering 7 universities, 4 industrial partners and 1 research institute, for the training of young researchers in the field of photodynamic treatments. The goal is to develop new active compounds that can efficiently fight microbial infections and cancer, two main challenges for food security and human health.