A data visualization of Massachusetts breakthrough cases!
Overall, the data from the Massachusetts department of health indicates a breakthrough rate of 0.29%.*
Total vaccinated: 4,388,111
Infection cases: 12,641
Hospitalizations: 496
Deaths: 124
Importantly, a department of health spokesperson has indicated that 73% of deaths were in individuals with underlying medical conditions that led them to be high risk. The median age of those who died was 81.7 years.
*Note that while it is realistic to capture nearly every hospitalization or death, not every positive case (non-hospitalized) is accounted for. This means that the % breakthrough rate is actually a bit higher than reported here. However, this also indicates that the % hospitalization rate is actually even lower than reported here. This is line with everything we know about vaccination protecting us from severe disease.