Answer:
Tratamiento (treatment): antibiótico , aspirina , operación , pastilla , radiografía , receta , tomar la temperatura 
Síntomas ( Symptoms): estornudos , fiebre , tos 
Enfermedad ( Disease): gripe , resfriado
Step-by-step explanation:
Three groups can be deduced from the words given: treatment, disease and symptoms.
Treatment: antibiotic , aspirin , operation , tablet , bone scan , recipe , take the temperature 
 Symptoms: sneeze , fever , cough 
 Disease: flu , cold