Claim: A respiratory droplet is a small aqueous droplet produced by exhalation, consisting of saliva or mucus and other matter derived from respiratory tract surfaces and he Viruses spread by droplet transmission include, but are not limited to,  influenza virus, commonly known as "the flu",  and SARS-CoV-2, Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the strain of coronavirus that causes coronavirus disease 2019 (COVID-19).
Evidence: A respiratory droplet is a small aqueous droplet produced by exhalation, consisting of saliva or mucus and other matter derived from respiratory tract surfaces. Viruses spread by droplet transmission include influenza virus, rhinovirus, respiratory syncytial virus, enterovirus, and norovirus; measles morbillivirus; and coronaviruses such as SARS coronavirus (SARS-CoV-1) and SARS-CoV-2 that causes COVID-19. Influenza, commonly known as "the flu", is an infectious disease caused by an influenza virus. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the strain of coronavirus that causes coronavirus disease 2019 (COVID-19), the respiratory illness responsible for the COVID-19 pandemic.