Infection Prevention and Control

Question 1

What is an aerosol?

Answer 1

collection of solid or liquid particles of any size suspended in a gas

Question 2

What was the dominant mode of transmission for COVID-19?

Answer 2

Aerosol

Question 3

What is a VOC (variant of concern)?

Answer 3

changes (of disease) have a clinical or public health significance that affects one or more of:
- transmissibility
- virulence
- vaccine effectiveness
- diagnostic testing

Question 4

What is meant by fine aerosol fraction?

Answer 4

aerosol particle size were <5um

Question 5

What respiratory infections are mostly transmitted by airborne aerosol route?

Answer 5

• TB
• measles
• chickenpox

Question 6

What are the 3 C’s in reference to transmission of respiratory viruses?

Answer 6

• closed setting (with poor ventilation)
• close contact
• crowding

Question 7

What is the recommended supply/extract ventilation of dental surgeries?

Answer 7

10 air changes per hour in dental surgery

Question 8

What engineering controls can be used to help prevent infection spread in dental setting?

Answer 8

• rubber dam
• high vol aspiration
• isolate people from hazard
• effective surgery ventilation

Question 9

What air disinfection devices can be used in dental surgeries?

Answer 9

• HEPA filters
• AV air disinfection

Question 10

What level should CO2 concentrations be kept below in dental surgery?

Answer 10

below 800ppm (10-15l/s/person)