Which technique uses barriers such as bed nets or window screens?

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Multiple Choice

Which technique uses barriers such as bed nets or window screens?

The technique being tested is using barriers to prevent contact between people and disease-transmitting insects. Bed nets and window screens physically block mosquitoes from reaching people, especially indoors at times when they are most active. This reduces the biting rate and, in turn, transmission, without depending on killing the insects with chemicals or relying on host immunity. Vaccines or chemoprophylaxis protect the host or parasite inside the body, not by blocking insect access. Trapping targets the insects themselves to reduce numbers, while chemical control uses pesticides to kill vectors rather than to create a barrier.

The technique being tested is using barriers to prevent contact between people and disease-transmitting insects. Bed nets and window screens physically block mosquitoes from reaching people, especially indoors at times when they are most active. This reduces the biting rate and, in turn, transmission, without depending on killing the insects with chemicals or relying on host immunity. Vaccines or chemoprophylaxis protect the host or parasite inside the body, not by blocking insect access. Trapping targets the insects themselves to reduce numbers, while chemical control uses pesticides to kill vectors rather than to create a barrier.

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