Final answer:
Adenoviruses typically cause respiratory illnesses and can lead to viral conjunctivitis, but they are not responsible for malaria, tuberculosis, or hepatitis.
Step-by-step explanation:
Adenoviruses are known for causing respiratory illnesses in humans. They are non-enveloped viruses that have protein spikes which allow them to attach to host cells. Adenoviruses can cause a variety of illnesses, such as viral conjunctivitis, which is an infection of the eye. It is important to note that while they are responsible for some types of conjunctivitis, they do not cause conditions such as malaria, tuberculosis, or hepatitis, which are caused by different pathogens.