But I do think that some are due to persistent infection.

A severe or persistent infection may require treatment by a doctor.

IL-21 may be a critical factor in the control of persistent viral infections.

As of March 10, 2013, 48 people had died and 720 were being treated for persistent fungal infections.

Treatment is straightforward, but one person in 10 will suffer chronic and persistent infection.

Further, there is no evidence that the poliovirus can cause a persistent infection in humans.

But any persistent, severe, or recurrent infections should be evaluated by your doctor.

This causes persistent infections and the virus is often dormant for many months or years.

In more severe or persistent infections, treatment may be continued beyond the normal treatment period.

Persistent infection will likely be treated with an alternate combination of medicines.