inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last pcr test or rapid antigen test was negative with the following criteria: * aged between 20 to 80 years old * persistent symptoms at least 4 weeks after recovery from covid-19 infection, including any of the following symptoms: dyspnea, fatigue, cough, headache, chest tightness, palpitations, loss of smell, anxiety, insomnia, brain fog or joint pain * able to speak and understand mandarin * no cognitive impairment (mini-mental state examination \> 24) * able to walk including those who need the walking aid * had mobile phones and could easily access the internet

inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last pcr test or rapid antigen test was negative with the following criteria: * aged between 20 to 80 years old * persistent symptoms at least 4 weeks after recovery from covid-19 infection, including any of the following symptoms: dyspnea, fatigue, cough, headache, chest tightness, palpitations, loss of smell, anxiety, insomnia, brain fog or joint pain * able to speak and understand mandarin * no cognitive impairment (mini-mental state examination \> 24) * able to walk including those who need the walking aid * had mobile phones and could easily access the internet

inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last pcr test or rapid antigen test was negative with the following criteria: aged between 20 to 80 years old persistent symptoms at least 4 weeks after recovery from covid-19 infection, including any of the following symptoms: dyspnea, fatigue, cough, headache, chest tightness, palpitations, loss of smell, anxiety, insomnia, brain fog or joint pain able to speak and understand mandarin no cognitive impairment (mini-mental state examination > 24) able to walk including those who need the walking aid had mobile phones and could easily access the internet

inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last pcr test or rapid antigen test was negative with the following criteria: aged between 20 to 80 years old persistent symptoms at least 4 weeks after recovery from covid-19 infection, including any of the following symptoms: dyspnea, fatigue, cough, headache, chest tightness, palpitations, loss of smell, anxiety, insomnia, brain fog or joint pain able to speak and understand mandarin no cognitive impairment (mini-mental state examination > 24) able to walk including those who need the walking aid had mobile phones and could easily access the internet

inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last polymerase chain reaction(pcr) test was negative with the following criteria: aged between 20 to 80 years old persistent symptoms after recovery from covid-19 infection, including any of the following symptoms: dyspnea, persistent cough, easily fatigue, headache or joint pain able to speak and understand mandarin no cognitive impairment (mini-mental state examination > 24) able to walk including those who need the walking aid had mobile phones and could easily access the internet

inclusion criteria: individuals who had been diagnosed with covid-19 positive and whose last polymerase chain reaction(pcr) test was negative with the following criteria: aged between 20 to 80 years old persistent symptoms after recovery from covid-19 infection, including any of the following symptoms: dyspnea, persistent cough, easily fatigue, headache or joint pain able to speak and understand mandarin no cognitive impairment (mini-mental state examination > 24) able to walk including those who need the walking aid had mobile phones and could easily access the internet