>> the danbury shakes in this book.that was the mercury poisoning that hatters would get in danbury, connecticut. >> from working with hats. i mean deadly conditions. and people would knowingly take those jobs and go in and work those jobs knowing that it was going to kill them. in effect the new jersey bureau of six to six in labor in one of their reports, the surprise is that men can be induced to work and death producing enclosures. it's hard to believe that men of ordinarily intelligence could be so indifferent to the ordinary laws of health. your book does a deep dive into this question in the smith mystery. and one of the parts, will you do quote a study about organizational silence. in the workplace both in the u.s. and another study in europe. talk about that a little bit. >> yeah so the first thing i looked at was the actual silenc silence. why didn't anybody say thing? why didn't i say anything. i was 45 years will be for even started thinking about this. i wanted to looked at the actual thing. the study said

paul nee works at danbury hospital in connecticut, where some 700 medical staff signed up for the vaccine in less than 24 hours what does the vaccine mean to health care workers? >> i think it's hope it may be the beginning of the end of covid >> reporter: in mississippi, where the state is out of icu beds, hope comes too late for frontline workers like angela howard's sister janet sittin she and her husband both contracted the virus at the same time >> they actually wheeled him into icu and let him hold her hand for a little bit. >> reporter: janet died weeks before the vaccine arrived. >> i wish it had been a month sooner however, i'm grateful that it's coming, and i'm more grateful than relieved that health care workers are receiving it first >> reporter: health care workers who are heroes willing to sacrifice to save lives, even when it costs them their own >> meagan joins us now from los angeles meagan, hospitals in california are filling up fast. how soon will hospitals receive the doses? >> reporter: jose, seven hospitals across the state are expecting to receive this vaccine as so