The dHealth Network builds on the new NEM core engine Symbol. Therefore, we decided to launch our network only after Symbol has gone live in February. Although our Testnet has been running stable for months we would like to wait if any issues occur during the Symbol launch by NEM that make changes in the code necessary. Once the exact date for the Symbol launch has been defined, we will communicate the dHealth Network launch date. In the meantime projects and tokens are still on the NEM NIS1.