This question was attempted by many candidates and their performance was fair. In Question 2(a) majority of candidates were able to define hormones it. In Question 2(b) many candidates focused on writing general preventive measures for communicable diseases. Most of the candidates answered questions in Question 2(c) correctly.

The expected answers include:

(a) Hormones
Are organic chemical substances produced by endocrine glands in small quantities directly into blood; to stimulate specific action/named                                                                    
NB: The points to score are demarcated by;

(b) Importance of isolation in controlling communicable diseases

• It prevents the spread of disease;
• It reduces cost of treatment;
• It helps localize infection;
• It reduces mortality rate.                                                                    

                           
(c) Examples of airborne diseases

• Cerebrospinal meningitis;
• Diphtheria;
• Measles;
• Poliomyelitis;
• Influenza/flu;
• Tuberculosis;
• Whooping cough/pertussis;
• Common cold;
• Pneumonia;
• Covid-19;
• Mumps;
• Chicken pox;                                                                                                  
• Small pox.

NB: Spelling must be correct to score.