Related Clues:

• Antiseptic target
• High-tech invader
• Purel target
• Idea's start
• Common cold cause
• Start, as of an idea
• Tiny bug
• It may be written in code
• 'Cootie'
• It may be what ails you
• Bug first discovered in 1898
• From which disease comes
• Micro-organism causing disease
• Hidden destructive code in computer program
• Infectious agent