What are the conditions favouring AIR-BORNE disease?

Many common infections can spread by airborne transmission at least in some cases, including but not limited to: CO.VID-19; measles morbillivirus, chickenpox virus; Mycobacterium tuberculosis, influenza virus, enterovirus, norovirus, and less commonly coronavirus, adenovirus, and possibly respiratory syncytial virus.

Air-borne diseases are favoured in various ways like if the pollution rate is high then the spreading of air-borne diseases will be high.

The air-borne disease can also be spread in case if a sick person sneezes or coughs the microbes that cause the disease will be spread in the air and could be inhaled by healthy people which will make them sick.

answer; ///i believe that the correct answer is (a) specialized cells)

when it's short and dry.