Is Someone Trying to Poison Harvard?

Two months ago, six Harvard Medical School researchers, who work with mice to determine how diseases interact with the immune system, became ill after drinking from a coffee machine in the New Research Building at the Longwood Medical area. It was determined that all of them had ingested sodium azide, a poisonous substance. Today, the Herald finds a source to assert that the incident couldn't have been an accident, even wondering whether it could have been attempted murder. Harvard appears to be keeping the investigation hush-hush, but the Herald reported that OSHA and the Boston Public Health Commission are involved.