Table 1 Search strategy in the searched databases according to PICO components

Pubmed

(“COVID 19” OR COVID19 OR COVID-19 OR “COVID-19 Virus” OR “COVID 19 Virus” OR “COVID-19 Viruses” OR (Virus AND COVID-19) OR “Wuhan Coronavirus” OR (Coronavirus AND Wuhan) OR “COVID19 Virus” OR “COVID19 Viruses” OR (Virus AND COVID19) OR (Viruses AND COVID19) OR “SARS-CoV-2 Infection” OR “SARS-CoV-2InfeCtions” OR (Infection AND SARS-CoV-2) OR “2019 Novel Coronavirus Disease” OR “2019 Novel Coronavirus Infection” OR “2019-nCoV Disease” OR “2019 nCoV Disease” OR “2019-nCoV Diseases” OR (Disease AND 2019-nCoV) OR “COVID-19 Virus Infection” OR “COVID 19 Virus Infection” OR “COVID-19 Virus Infections” OR (Infection AND “COVID-19 Virus”) OR “Coronavirus Disease 2019” OR (“Disease 2019” AND Coronavirus) OR “Coronavirus Disease-19” OR “Coronavirus Disease 19” OR “Severe Acute Respiratory Syndrome Coronavirus 2” OR “SARS Coronavirus 2 Infection” OR “COVID-19 Virus Disease” OR “COVID 19 Virus Disease” OR “COVID-19 Virus Diseases” OR (Disease AND “COVID-19 Virus”) OR (“Virus Disease” AND COVID-19) OR “2019-nCoV Infection” OR “2019 nCoV Infection” OR “2019-nCoV Infections” OR (Infection AND 2019-nCoV) AND “Mouth Rinse” OR “Mouth Rinses” OR “Mouth Bath” OR “Mouth Baths” OR “Mouth Wash”)

scopus

(ALL(“COVID 19”) OR ALL(COVID19) OR ALL(COVID-19) OR ALL(“COVID-19 Virus”) OR ALL(“COVID 19 Virus”) OR ALL(“COVID-19 Viruses”) OR ALL((Virus AND COVID-19)) OR ALL(“Wuhan Coronavirus”) OR ALL((Coronavirus AND Wuhan)) OR ALL(“COVID19 Virus”) OR ALL(“COVID19 Viruses”) OR ALL((Virus AND COVID19)) OR ALL((Viruses AND COVID19)) OR ALL(“SARS-CoV-2 Infection”) OR ALL(“SARS-CoV-2 Infections”) OR ALL((Infection AND SARS-CoV-2)) OR ALL(“2019 Novel Coronavirus Disease”) OR ALL(“2019 Novel Coronavirus Infection”) OR ALL(“2019-nCoV Disease”) OR ALL(“2019 nCoV Disease”) OR ALL(“2019-nCoV Diseases”) OR ALL((Disease AND 2019-nCoV)) OR ALL(“COVID-19 Virus Infection”) OR ALL(“COVID 19 Virus Infection”) OR ALL(“COVID-19 Virus Infections”) OR ALL((Infection AND “COVID-19 Virus”)) OR ALL(“Coronavirus Disease 2019”) OR ALL((“Disease 2019” AND Coronavirus)) OR ALL(“Coronavirus Disease-19”) OR ALL(“Coronavirus Disease 19”) OR ALL(“Severe Acute Respiratory Syndrome Coronavirus 2”) OR ALL(“SARS Coronavirus 2 Infection”) OR ALL(“COVID-19 Virus Disease”) OR ALL(“COVID 19 Virus Disease”) OR ALL(“COVID-19 Virus Diseases”) OR ALL((Disease AND “COVID-19 Virus”)) OR ((“Virus Disease” AND COVID-19)) OR ALL(“2019-nCoV Infection”) OR ALL(“2019 nCoV Infection”) OR ALL(“2019-nCoV Infections”) OR ALL((Infection AND 2019-nCoV))) AND (ALL(“Mouth Rinse”) OR ALL(“Mouth Rinses”) OR ALL(“Mouth Bath”) OR ALL(“Mouth Baths”) OR ALL(“Mouth Wash”)))

Embase

(“coronavirus infections” OR “coronavirus” OR “covid 2019” OR “SARS2” OR “SARS-CoV-2” OR “SARSCoV-19” OR “severe acute respiratory syndrome coronavirus 2” OR “coronavirus infection” OR “severe acute respiratory pneumonia outbreak” OR “novel cov” OR “2019ncov” OR “sars cov2” OR “cov2” OR “ncov” OR “covid-19” OR “covid19” OR “coronaviridae” OR “corona virus” OR “COVID-19 pandemic” OR “2019 novel coronavirus disease” OR “SARS-CoV-2 infection” OR “COVID-19 virus disease” OR “2019 novel coronavirus infection” OR “2019-nCoV infection” OR “coronavirus disease 2019” OR “coronavirus disease-19” OR “2019- nCoV disease” OR “COVID-19 virus infection” OR “2019-nCoV” OR “SARS-CoV-2”) AND (“mouthwashes” OR “Mouth Rinse” OR “Mouth Rinses” OR “Mouth Bath” OR “Mouth Baths” OR “mouthwash” OR “Mouth Wash”)

Web of science

(ALL = “COVID 19” OR ALL = COVID19 OR ALL = COVID-19 OR ALL = “COVID-19 Virus” ALL = “COVID 19 Virus” OR ALL = “COVID-19 Viruses” OR ALL = (Virus AND COVID-19) OR ALL = “Wuhan Coronavirus” OR ALL = (Coronavirus AND Wuhan) OR ALL = “COVID19 Virus” OR ALL = “COVID19 Viruses” OR ALL = (Virus AND COVID19) OR ALL = (Viruses AND COVID19) OR ALL = “SARS-CoV-2 Infection” OR ALL = “SARS-CoV-2 Infections” OR ALL = (Infection AND SARS-CoV-2) OR ALL = “2019 Novel Coronavirus Disease” OR ALL = “2019 Novel Coronavirus Infection” OR ALL = “2019-nCoV Disease” OR ALL = “2019 nCoV Disease” OR ALL = “2019-nCoV Diseases” OR ALL = (Disease AND 2019-nCoV) OR ALL = “COVID-19 Virus Infection” OR ALL = “COVID 19 Virus Infection” OR ALL = “COVID-19 Virus Infections” OR ALL = (Infection AND “COVID-19 Virus”) OR ALL = “Coronavirus Disease 2019” OR ALL = (“Disease 2019” AND Coronavirus) OR ALL = “Coronavirus Disease-19” OR ALL = “Coronavirus Disease 19” OR ALL = “Severe Acute Respiratory Syndrome Coronavirus 2” OR ALL = “SARS Coronavirus 2 Infection” OR ALL = “COVID-19 Virus Disease” OR ALL = “COVID 19 Virus Disease” OR ALL = “COVID-19 Virus Diseases” OR ALL = (Disease AND “COVID-19 Virus”) OR ALL = (“Virus Disease” AND COVID-19) OR ALL = “2019-nCoV Infection” OR ALL = “2019 nCoV Infection” OR ALL = “2019-nCoV Infections” OR ALL = (Infection AND 2019-nCoV)) AND (ALL = “Mouth Rinse” OR ALL = “Mouth Rinses” OR ALL = “Mouth Bath” OR ALL = “Mouth Baths” OR ALL = “Mouth Wash”))

Cochrane library

TI = (“coronavirus infections” OR “coronavirus” OR “covid 2019” OR “SARS2” OR “SARS-CoV-2” OR “SARSCoV-19” OR “severe acute respiratory syndrome coronavirus 2” OR “coronavirus infection” OR “severe acute respiratory pneumonia outbreak” OR “novel cov” OR “2019ncov” OR “sars cov2” OR “cov2” OR “ncov” OR “covid-19” OR “covid19” OR “coronaviridae” OR “corona virus” OR “COVID-19 pandemic” OR “2019 novel coronavirus disease” OR “SARS-CoV-2 infection” OR “COVID-19 virus disease” OR “2019 novel coronavirus infection” OR “coronavirus disease 2019” OR “coronavirus disease-19” OR “COVID-19 virus infection” OR “SARS-CoV-2” OR “2019-ncov infection” OR “2019-ncov disease” OR “2019-ncov” OR “sars-cov” OR “middle east respiratory syndrome coronavirus”OR “severe