From the Introduction: "Since 1980, outbreaks of emerging infectious diseases (EID) have been occurring with greater frequency and causing higher numbers of human infections. Roughly 65% of these outbreaks have been caused by zoonotic pathogens, involving pathogen spread from animals to humans, often through a vector, such as a mosquito. Each year, zoonotic pathogens cause an estimated 1 billion cases of human illness, including 15 million deaths. All the EID outbreaks that gained notoriety in the past two decades were caused by zoonotic pathogens: severe acute respiratory syndrome (SARS, 2002-2003), avian influenza H5N1 (Bird Flu, 2005), pandemic influenza H1N1 (Swine Flu, 2009), Middle East respiratory syndrome coronavirus (MERSCoV, 2013), Ebola (2014-2016), Zika (2015-2016), yellow fever (2016), Ebola (2018-2020), and the novel coronavirus (COVID-2019) outbreak."
CRS In Focus, IF11461
Congressional Research Service: https://crsreports.congress.gov/