Most short fevers in children are likely to be due to viruses, and transmitted from others having that particular viral infection.
Transmission is usually by droplets when an affected person or child coughs , in which the virus spreads upto 6 feet away. Additionally direct transmission from affected person can happen by kissing , hugging , and holding or shaking hands .
Avoiding crowded places would reduce the number of infections. Sending children back to school, before their immunity has completely recovered will aggravate the condition.