Overall, results from the phase III Valor trial testing Lyme disease vaccine PF-07307405 “strengthen confidence” in the candidate, according to partners Pfizer Inc. and Valneva SE, with the big pharma now looking toward regulatory submissions. Investors, however, focused on the fact that the study, which demonstrated more than 70% efficacy in preventing Lyme disease in individuals, ages 5 and older, failed to hit the statistical criterion for the first prespecified analysis.

Parkinson’s disease (PD) involves the progressive loss of dopaminergic neurons, particularly in the substantia nigra. This neurodegeneration is linked to the abnormal accumulation of α-synuclein, a protein that forms toxic aggregates and spreads between cells, damaging them. At the 20th International Conference on Alzheimer’s and Parkinson’s Diseases (AD/PD), held from March 17 to 21, 2026, in Copenhagen, several strategies were presented that aim to modify the course of the disease and offer real alternatives to purely symptomatic treatments.