These have been issued to protect children from excessive screen time.
Scientists in the USA conducted the research.
This is the first polio case registered in Gaza in 25 years.
The vaccine, created by BioNTech, offers hope for treatment against this disease.
The announcement has been made by Dr. Tedros Adhanom Ghebreyesus, the head of WHO.
This was highlighted in a recent study conducted by Stanford University.
