. . . . . . "Covid -19" . "COVID\u201319" . "mortality" . . . . . . . "COVID-19 disease" . . "COVID\u201019" . . "Covid-19-infection" . . . . . . . . "COVID-shortened" . "health protocols" . . "respiratory illness" . . "coronavirus-related" . . "COVID-19 restrictions" . "Covid-19 Simulator" . . . . . . . . . . . . . . . . . "Corona" . . . . . . . . . . . . . . "SARS-CoV-2" . . "virus" . . "Coronavirus" . . . . . . . . . . "Corona Virus Disease" . . "Sars-Cov-2" . . . . . "Coronavirus epidemic" . "COVID-19" . . . . . . . . . . . . . "Coronavirus disease 2019" . . . . . . . . . . . . . . "COVID-19 virus" . . . . . . "COVID-19 response" . . . . . "Coronavirus Disease 2019 (COVID-19)" . . "coronavirus disease 2019" . . "COVID-19 infection" . . . . . "corona" . . . . . . . . . . "COVID Manager" . . . . . . "a novel infectious disease" . . . . "COVID-19 situation" . . . . . "covid-19" . . . . . . . . . . . . . "COVID-19 pandemic in India" . . . . . . . . . . . . . . . . . . . "COVID-19 virus and disease" . . . . . . . . . . . . . "SARS-CoV-2 infection" . "Tracking COVID-19 Variants Act" . . . "COVID-19 safety measures" . . . . . "corona virus" . . . . . . . . . . . "the virus" . "COVID, (the) coronavirus" . . . . "COVID-19#Immunity" . . . . . . . "COVID-19#Comorbidities" . . . . . "COVID-19 pandemic" . "the coronavirus" . . . . "coronavirus disease 2019 self-isolation measures" . . . . . . . . . . . "COVID-19#Treatment" . . . . . . . . . "complicate" . . . . . . . . . "COVID-19#Prognosis" . . . . . . . . . . . "coronavirus disease 2019 (COVID-19)" . . . . "coronavirus pandemic" . . . . "COVID -19" . . . . . . "coronavirus outbreak" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Severe disease" . . . . "Coronavirus pandemic" . . . . . . . . . . . . "novel coronavirus" . . . . . . . . . . . . . . . "U07.1" . . "COVID" . . . . . . . . . . . "COVID-19 complications" . "virtually" . . . . . "Covid" . . . . "COVID-19 Pandemic" . . . . . . . . . . . . . . . "Covid-19 Global Pandemic" . . . . . . . "Covid 2019" . . . "2020 COVID-19 pandemic" . . . . . . . "COVID\u201119" . . . . . . . . "Covid19 diseases" . . . . . . "COVID-19" . . . . . "COVID19" . . . . . . . . . "Covid-19 infection" . . . . . . . . . . . . . . "coronavirus" . . . . . "reinfection" . "Covid-19" . . . . "the COVID-19 virus." . . . . . "Coronavirus (COVID-19)" . . . . . . . . "Covid19" . . . "," . . "COVID-19 global pandemic" . . . . . "covid 19" . "the pandemic" . . . . . "Coronavirus disease" . . . . . . . . "COVID-19 Emergency Medical Supplies Enhancement Act of 2021" . . . "COVID protocols" . . "preventative measures" . . "origin of the virus" . . . . . . . . . . . . . . . . . . . . . "disease" . . . . . . . . . "COVID-19 quarantines" . . "Coronavirus disease 2019 (COVID-19)" . . . . . . . . . . . . . . . . "COVID-19 virus infection" . "U07.2" . . . . . . . . . . . . "COVID-19 viral disease" . . . . . . . . . . . "a pandemic" . . . . . "corona pandemic" . . . . . . . . . "19" . . . "2020 COVID-19 health crisis" . . . "COVID-19#Prevention" . . . . . . . "COVID-19#History" . . . "delayed" . . . . . . . . "coronavirus disease-2019" . . . "Wuhan virus" . . . "COVID-21" . . "pandemic" . . . . . "COVID-19#Research" . . . "covid" . . . . . . . . . . . . . . . . . "coronawinter" . . . . . . . . . . . "COVID 19" . . . . . . . . . "the disease" . . . . . . . . . . . . . . . . . . . . . . "COVID-" . . . . . . . . . . . . . . . . . . "COVID\u201319 pandemic" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "COVID-19 Global Pandemic" . . . . . . . . . . . . . "Covid 19" . . . . . . . . . . . . . . . . . "human-to-human transmission" . "COVID-19 infections" . . . . . . . . . . . . . . . . . . "Covid infection" .