If CDC or WHO declares the spread of a disease to be a Level 6 pandemic CDC can force you to take a vaccine in the US

WHO declared H1N1 to be a pandemic level 6.

Im guessing that the current media and social media push against anti-vaxxers was a push toward getting us all willing to be injected when the CDC tells you that you have no choice.

The Pandemic plans can be found here:

https://www.cdc.gov/flu/pandemic-resources/planning-preparedness/national-strategy-planning.html

HOWEVER…this I found interesting….The CDC's plan also outlays border security methodology to stop the incoming spread of disease, as shown on their newest update of June 2017 ( Page 19)

https://www.cdc.gov/flu/pandemic-resources/pdf/pan-flu-report-2017v2.pdf