Please choose the correct ending to complete the given sentence: Health: [header] How to tell if you have a cold sore [title] Understand that hsv-1 infections are common. [step] Up to 60% of americans have hsvi-1 by adolescence, and 85% by the time they reached their 60s. In britain about seven in 10 people have it, but only one in five are aware of it.

Ending1: Generally speaking, about 10% of cancer patients have it. [substeps] It is unclear if hsv-1 cases in bed, oral, or vaginal are a result of a simple viral infection, although hsv-1 may also be caused by indigestion. Ending2: [title] Determine whether you have hsv-1 in another person, but not both. [step] Viruses can spread into the body via contact. Ending3: This is because some people carry the infection, but don't have any symptoms. [title] Recognize the symptoms of the first outbreak. Ending4: The most common symptoms include fever, blurred vision, vomiting, and pale skin. However, you might also experience other unpleasant reactions like nosebleeds, headaches, petechiae vomiting, and mouth discharge.

Answer format: ending1/ending2/ending3/ending4