A80 Acute poliomyelitis

A81 Slow virus infections of central nervous system

A82 Rabies

A83 Mosquito-borne viral encephalitis

A84 Tick-borne viral encephalitis

A85 Other viral encephalitis, not elsewhere classified

A86 Unspecified viral encephalitis

A87 Viral meningitis

A88 Other viral infections of central nervous system, not elsewhere classified

A89 Unspecified viral infection of central nervous system