objective(148) Result(148) COVID-19(143) Health(119) COVID-19 pandemic(114) Support(71) mHealth(69) pandemic(66) Care(64) information(64) conducted(61) Contact tracing(58) public health(52) Intervention(51) Patient(48) participant(47) Analysis(44) Research(44) tracing(44) age(41) analyzed(41) Mobile health(38) effective(38) Digital health(38) identify(38) Mobile(37) addition(37) evaluate(36) management(36) app(34)