Chemokines function mainly to:

Prion diseases primarily affect neural tissue.

Dendritic cells link innate and adaptive immunity.

Adaptive immunity differs from innate immunity because adaptive immunity:

Oncogenic viruses can contribute to cancer development. 

Lysogenic bacteria are immune to superinfection by the same phage.

Neutrophils differ from macrophages because neutrophils:

Mucous membranes protect the body primarily by:

Viroids differ from viruses because they:

Complement proteins help eliminate microbes.