According to a study in American Journal of Preventive Medicine, only half of American adults with work-related asthma get the recommended vaccination against pneumococcal disease.

Each year, about 900,000 Americans get pneumococcal pneumonia, and 5-7% die from it, the CDC estimates. Adults with asthma who get pneumococcal pneumonia, a lung disease, are at risk for such complications as asthma exacerbation and invasive pneumococcal disease.

However, an analysis of 2012-13 national data found that only 54% of adults with work-related asthma got the shot. The rate was lowest among Hispanics (36%), people without health insurance (39%), and adults aged 18 to 44 (42%).