Hidden Markov Model algorithmbetawhat does it mean ?

This method use an Hidden Markov Model to determine epidemic periods in a time serie. This model, assume that the time serie could be a mixing of differents process resulting of differents laws (for example epidemic and non epidemic). The HMM algorithm determine which law is the more likely to have generated an observed sequence of values. In this website we implemented a 2 state HMM (epidemic and non epidemic) with 2 gaussian periodic laws.