If the Secretary of HHS declares a quarantine is needed, under 42 USC 268, it will be Coast Guard and CBP who enforce that order over the entire US. https://www.govinfo.gov/content/pkg/USCODE-2010-title42/pdf/USCODE-2010-title42-chap6A-subchapII-partG-sec268.pdf

2) 42 CFR 70.1 authorizes HHS Secretary to order agents you board any vessel or transportation to search for those infected. Can force you to provide personal information. https://www.law.cornell.edu/cfr/text/42/70.10

3) 42 CFR 70.6 allows agents to detain, apprehend & isolate those they believe may be “pre-communicable” & communicable for as long as they deem appropriate. https://www.law.cornell.edu/cfr/text/42/70.6

42 USC 264 (G) allows HHS Secretary to authorize law enforcement to prevent people from entering or leaving their states because of communicable disease emergency declaration. https://www.govinfo.gov/content/pkg/USCODE-2010-title42/pdf/USCODE-2010-title42-chap6A-subchapII-partG-sec264.pdf

6 USC 467 requires HHS to coordinate quarantine with DOJ, DHS & FBI. Not with state and local health officials but with law enforcement. https://www.govinfo.gov/content/pkg/USCODE-2011-title6/pdf/USCODE-2011-title6-chap1-subchapVIII-partH-sec467.pdf

6 USC 466 (a)(4)-Can use military for civilian law enforcement when Congress authorizes, or President determines that use of Armed Forces is required to fulfill the President’s obligations under the Constitution to respond promptly in time of ...

... war, insurrection or other serious emergency.” What defines a serious emergency? A communicable disease? https://www.law.cornell.edu/uscode/text/6/466