Updated: 8:31 PM EST Feb 23, 2021 Karen Anderson David Hurlburt 5 Investigates is looking into how many COVID-19 vaccine doses have been thrown away in Massachusetts as people continue to struggle to book vaccination appointments.Facilities and sites that administer the vaccines are required to report information on "waste" to the state, which is when those sites have to throw out doses of vaccine for one reason or another. 5 Investigates found that 1,204 doses of the vaccine had gone to waste in Massachusetts as of Monday. That number represents just 0.07% of all vaccines that were shipped to the state since they became available in December.Most of the 1,204 wasted vaccines were made by Cambridge-based Moderna, as 982 Moderna doses were thrown away compared to 222 Pfizer doses.The data 5 Investigates received from the state included more than 100 facilities and vaccination sites.5 Investigates has learned that the primary reason for waste is an open vial at the end of the day that was not fully used due to "no-shows" for appointments. That issue is bigger with Moderna vaccines since their vials contain more doses. This form of waste has improved, as the state encouraged sites to vaccinate anyone, regardless of eligibility, if there was vaccine left over.The data on waste does not include vaccine doses provided under federal programs, such as doses that were sent to pharmacies that handled nursing home vaccinations or Veterans Affairs hospitals.