CDC reports that the best way to protect yourself from the flu is to get vaccinated every year, and has begun a campaign to encourage everyone to get the flu vaccine, especially those with weakened immune systems like CKD patients, who have an increased risk of severe illness from the flu, even without considering COVID-19 – which you can get along with the flu. Find campaign resources like the animation below, in English and Spanish, at https://www.cdc.gov/flu/resource-center/freeresources/graphics/animated-fight-flu-punch.htm .
