Measles left Ada Lovelace unable to walk and confined to bed in 1829. She was 13 when she suffered the illness, and her recovery was prolonged; accounts describe her as unable to walk for several years rather than experiencing a brief convalescence.
The episode was one of several serious health problems in Lovelace’s life. A surviving account associated her loss of mobility with the effects of measles and rapid growth. The historical wording is “paralyzed,” but modern readers should be cautious about assuming a precise neurological diagnosis: nineteenth-century descriptions did not use today’s medical classifications.
Her illness did not end her intellectual education. Lovelace continued studying mathematics and science with private tutors, including William Frend, William King, and Mary Somerville. Somerville later helped introduce her to Charles Babbage, whose mechanical-computing ideas became central to Lovelace’s career.
This fact is often confused with scarlet fever, smallpox, or cholera because all were serious nineteenth-century diseases. The documented illness connected with her prolonged loss of mobility, however, was measles.