Question 16 · LEK · Epidemiology of infectious diseases
It was proved in an experimental study in 2013 that surgical masks are about 3 times more effective in filtering exhaled air (for Bacillus atrophaeus and MS2 bacteriophage) than homemade masks made of T-shirts, scarves or pillowcases. Despite that, homemade masks seem to be better than not having any protection against airborne diseases and can be used for:
- A. immunization of people susceptible to infection.
- B. neutralizing the source of infection.
- C. cutting the transmission pathways of infection.
- D. general epidemiological surveillance.
- E. identification of the epidemiological chain.
Hint
Consider which link of the epidemiological chain a barrier over the mouth and nose interrupts.
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