PONTIAC (WWJ) – There are now two confirmed human cases of West Nile Virus in Oakland County.

This latest comes after, earlier this month, Michigan Department of Health and Human Services reported cases in Macomb, Monroe and Ottawa counties,

READ MORE: 23rd Annual 'A Home For The Holidays At The Grove' Comes To CBS On Sunday, December 5th

On top of those cases, officials with the Oakland County Health Division say, two mosquito pools, a crow and a blood donor have also tested positive for the virus.

“All residents are strongly urged to follow prevention tips to protect themselves from WNV, especially those who are 50 and older who are more susceptible to severe symptoms,” said Kathy Forzley, OCHD manager/health officer. “Most people infected with WNV do not have any symptoms, but for those who do become sick, the disease can be serious, even fatal.”

No details have been released about the ill residents.

Officials health officials suggest using insect repellent, wearing light-colored, long-sleeved shirts and pants, and limiting outdoor activity from dusk to dawn. Most people who are infected with the virus have no symptoms; but others, including the elderly, could have serious complications.

READ MORE: MDHHS Updates COVID-19 Quarantine Guidance For Michigan Schools

When applying insect repellents, health officials say it’s important to keep the following guidelines in mind:

• Before applying repellent, read all label directions; not all repellents are intended to be applied to the skin.

• Repellents with low concentrations (10 percent or below) are effective and may be preferred in most situations. Start with a low-concentration product and re-apply if necessary.

• If applying repellents over a long period of time, alternate the repellent with one having another active ingredients.

MORE NEWS: More Than 100 Michigan Schools Close Due To Copycat Threats After Oxford High Shooting

For information about West Nile virus activity in Michigan and to report sick or dead birds, visit www.michigan.gov/westnile.