Analyse @SFBART's tweets
Starting this month, BART is piloting 2 tests to improve air filter and potentially further reduce COVID-19 risk in a train car by installing:
1) higher-grade, denser filter panel that will trap smaller particles
2) Ultraviolet light source inside HVAC unit which can zap a virus https://t.co/PCnj7RxTo3
1) higher-grade, denser filter panel that will trap smaller particles
2) Ultraviolet light source inside HVAC unit which can zap a virus https://t.co/PCnj7RxTo3