Less severe symptoms may last for 1 or 2 weeks.

Children 3 months to 2 years old have the most severe symptoms.

But why some men have more severe symptoms than others is not known.

With severe symptoms, the first step is to control the disease.

Severe symptoms may not appear until months or years later.

In some cases, severe symptoms appear within 30 to 60 minutes.

This can be because of severe symptoms or for other reasons.

More than half said they experienced symptoms severe enough to need bed rest.

It seems to be most effective in patients with less severe symptoms.

Severe symptoms are most likely to occur in young children.