User blog comment:SkyrunnerM35/How many times have you been trolled in SAS 4?/@comment-220.244.165.213-20141204012058/@comment-24659969-20141204030616

For vaccine, if the door refuse to open, wait until 8 minute left mark. It will be re-opened.

Also some of your bugs are related to other player lags. Mostly due to peeps forcing to play this game on rather below recommended phone performance. Remember phone wi-fi is not as good as your laptop / desktop.