Symptoms are:

• Fever
• Runny Nose
• Sore Throat
• Headache
• Generally feeling unwell

After a couple of days, a bright red rash appears on both cheeks.  The rash usually lasts for 2 weeks but can come and go for 6 weeks.  When the rash has appeared, you are no longer infectious, but you can pass slapped cheek on for 5 to 6 days before the rash appears.

Please see the Health New Zealand website on this for further information.

https://info.health.nz/conditions-treatments/skin/slapped-cheek/