By the authority vested in me as President by the Constitution and the laws of the United States of America, including section 301 of title 3, United States Code, it is hereby ordered as follows:

Section 1. Findings. (a) Influenza viruses are constantly changing as they
circulate globally in humans and animals. Relatively minor changes in these
viruses cause annual seasonal influenza outbreaks, which result in millions
of illnesses, hundreds of thousands of hospitalizations, and tens of thousands
of deaths each year in the United States. Periodically, new influenza A
viruses emerge from animals, including birds and pigs, that can spread
efficiently and have sustained transmission among humans. This situation
is called an influenza pandemic (pandemic). Unlike seasonal influenza, a
pandemic has the potential to spread rapidly around the globe, infect higher
numbers of people, and cause high rates of illness and death in populations
that lack prior immunity. While it is not possible to predict when or how
frequently a pandemic may occur, there have been 4 pandemics in the
last 100 years. The most devastating pandemic occurred in 1918–1919 and
is estimated to have killed more than 50 million people worldwide, including
675,000 Americans. https://www.govinfo.gov/content/pkg/FR-2019-09-24/pdf/2019-20804.pdf