Related Clues:

• Cold sound?
• Preceder of 'Bless you!'
• Reaction to ragweed
• Sound from a cold sufferer
• Sound prompting a "Gesundheit!"
• 'Gesundheit' elicitor
• Flu season sound
• Sound of a minor explosion
• 'Gesundheit!' evoker
• Sound of a natural explosion
• 'Gesundheit' lead-in
• 'Bless you' prompter
• 'Bless you!' prompter
• Dander reaction, perhaps
• Allergic reaction?