Missing reports

Imagine, an experimental vaccine treatment being manufactured during an epidemic. In which, all the naval crew on a military war ship during the epidemic where vaccinated. Not by choice but by coercion of job loss and incentivised with extra money. 
The resultant illnesses, from the new vaccination, included some that were much worse than any other ordinary case of the disease and even death. 
Surprisingly the medical reports were never published for some reason!