Surveillance data from 2011–2020 indicate a lower risk of Lyme disease in the USA in even-numbered years
摘要
From 2011–2020 the number of reported cases of Lyme disease in the USA was lower in each even-numbered year compared with the preceding odd-numbered year. This observation suggests that fewer nymphal stage Ixodes scapularis ticks infected with Borrelia burgdorferi were present during even-numbered years in locations where people spend time.