Microbiology B19 usually causes a very mild disease. Two groups of people for whom it can be serious, however, are? A teenagers and pregnant women B pregnant women and sickle-cell anemics C the sexually promiscuous and drug addicts D alcoholics and asplenics 💡 Explanation B19 usually causes a very mild disease. Two groups of people for whom it can be serious, however, are? ✓ Correct Answer: B. pregnant women and sickle-cell anemics