Google and Yandex search bots regularly scan available websites. If a search bot detects a virus or considers a website unsafe for users, such website will be included in the dedicated database and wont be displayed in search results. Many popular browsers also use virus databases and can block a website or display security warnings to its visitors. The website status will be updated by a search bot and the changes will be detected by the monitoring service once the cause of the website blocking is eliminated. This procedure usually takes a few days.