Tetanus
Table:
Tetanus
Other names	Lockjaw

Muscle spasms (specifically opisthotonos) in a person with tetanus. Painting by Sir Charles Bell, 1809.
Specialty	Infectious disease
Symptoms	Muscle spasms, fever, headache[1]
Usual onset	3–21 days following exposure[1]
Duration	Months[1]
Causes	Clostridium tetani[1]
Risk factors	Break in the skin[2]
Diagnostic method	Based on symptoms[1]
Prevention	Tetanus vaccine[1]
Treatment	Tetanus immune globulin, muscle relaxants, mechanical ventilation[1][3]
Prognosis	10% chance of death[1]
Frequency	209,000 (2015)[4]
Deaths	56,700 (2015)[5]

Using the given table, state whether the hypothesis is entailed, neutral, or refuted. Conclude with JSON {"answer": "YOUR ANSWER"} — nothing else.

Assertion: Muscle spasms, fever, and headache are risk factors of tetanus.

answer: refuted