Signs and symptoms of E. coli O157:H7 infection typically begin three or four days after exposure to the bacteria, though you may become ill as soon as one day after to more than a week later. Signs and symptoms include:
WPA - Wi-Fi Protected Access. Definition: WPA is a security technology for Wi-Fi wireless computer networks. WPA improves on the authentication and encryption features of WEP (Wired Equivalent Privacy). In fact, WPA was developed by the networking industry in response to the weaknesses of WEP.
In a wireless network, the WPA key is a password that protects the network from outside intruders. If a wireless router is set up with WPA encryption, you need the WPA key for network access and to make changes to the settings of your network. I would suggest you refer the link and check if it helps.