Social media contain a lot of personal information and can be used as an additional data source for analysis of social processes in real world. Especially processes that are hardly observable in real world like spread of infections or interest and attitude of society to drug usage. Despite the fact that social media cannot replace traditional sources of information are available from social researches or official statistical indicators provided by government, they can complement this data. Another advantage of social media is that they provide macro and micro characteristics of users. Macro characteristics are general interest of whole population of users to some topic and micro characteristics are for example centrality of user to some community. And again social media reveal knowledge about micro level of social processes while other sources of information are more about macro parameters.