honeypot link
skip to main content
skip to main content
Professional
Consumer
MERCK MANUAL
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
DRUG INFO
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
Home
/
Quick Facts: Infections
/
Respiratory Viruses
/
Respiratory Viruses
Expand all
Collapse all
Common Cold
What is the common cold?
What causes a cold?
What are the symptoms of a cold?
How can doctors tell if I have a cold?
How are colds treated?
How can I prevent colds?
Influenza (Flu)
What is influenza?
What causes influenza?
What are the symptoms of flu?
How can doctors tell if I have the flu?
How do doctors treat the flu?
How can I prevent the flu?