Seres Therapeutics has entered a three-year research collaboration with AstraZeneca. The collaboration will focus on advancing mechanistic understanding of the microbiome in augmenting the efficacy of cancer immunotherapy, including potential synergy with AstraZeneca compounds.   AstraZeneca will provide Seres with $20 million in three equal installments over two years, with the first payment due at the start of the agreement. In addition, AstraZeneca will also reimburse Seres for research activ...