Answer:c. indirect contact transmission
Explanation:
Indirect contact infections is one that is propagated when an infected person let out droplets either through sneezes or coughs, sending infectious droplets into the air or on formites.
The samples collected are for to examine the vehicles, vectors, droplets- nuclei and formites of pathogens of transmission. The above collection methods inference indirect transmission and its method of transmission is key to study the disease type.
