Many People are discussing the issue of Masks.

Can the government legally force you to wear a mask?
The answer is "yes." In a pandemic, governments have the authority to do a lot of things that would otherwise be questionable.
Think of it like this: The government has the right to ban smoking in public places because your smoking can affect my health. And some places have signs that say, "No shirt, no shoes, no service." Just add "no mask" to the sign.
However, there are exceptions. If you cannot wear a mask for health reasons or if you are in a "protected class," then you might get a mask pass. Syracuse.com turned to a prosecutor for advice:
"All businesses have the right to refuse service so long as it is not violating one of those protected classes," said Robert Mascari, chief assistant district attorney in Madison County. "You can't refuse to serve me because I'm half Italian and half Irish. You can refuse to serve me if I'm being an idiot."
Anti-maskers have claimed a "disability" to avoid wearing face masks.
Doron Dorfmann, a Syracuse University law professor who specializes in disability law, told Syracuse.com:
There may be legitimate disabilities that would prevent someone from wearing a mask: someone with autism who has sensory issues, for example, or someone with a respiratory problem for which a mask would make breathing difficult.
Under the (federal Americans with Disabilities Act), he said, store managers must be cautious in questioning anyone who says they have a disability. The manager, for example, can't ask what the disability is.
Shop keepers can ask two questions of that person, Dorfman said: "Is (not wearing a mask) an accommodation? What kind of benefit do you get from not wearing a mask?"
What disabilities must you prove to avoid having to wear a mask?
When a local or state government issues a "must wear" order, it gives individual businesses a lot of legal cover to enforce mask requirements. Without the government's order, an individual business might run into some trouble denying customers who claim to have disabilities that prevent them from wearing masks.
Face masks create a real problem for individuals who rely on lip reading to communicate. Retailers might try to provide sanitized dry erase boards or turn to text messaging with customers to show they want to accommodate everyone.
The National Law Review warned that businesses that exclude non-face-mask-wearing customers who claim a disability have to reach a pretty high legal bar:
The ADA permits a retailer to deny goods or services to an individual with a disability if their presence would result in a "direct threat" to the health and safety of others, but only when this threat cannot be eliminated by modifying existing policies, practices or procedures or permitting another type of accommodation. Whether a customer poses direct threat is an individualized, fact-sensitive inquiry. If a business does not have a clear policy of turning away customers who refuse to wear face masks, and turns away an individual for that reason, the business must be prepared to identify how/why that individual's specific, observable, condition/behaviors made them a "direct threat".
So, what would that "direct threat" look like? The ADA says that a direct threat is "a significant risk to the health or safety of others that cannot be eliminated by a modification of policies."
It might be difficult to deny service to a person who does not have COVID-19 symptoms. The Law Review said:
For example, if the person exhibited generally recognized symptoms of COVID-19 (such as aggressive coughing compounded with profuse sweating or visible difficulty breathing), refusal of service without a mask on an individualized basis may be justifiable. Conversely, a business could be hard-pressed to successfully argue that a customer without a face mask posed a "direct threat" if he or she was asymptomatic or if there was some form of accommodation that would have allowed the person to be served (e.g., allowing someone to wear a scarf instead of a mask). Upon refusing service on "direct threat" grounds, the store should contemporaneously document its actions and justifications in the event their decision is later challenged.
Can an employer force you to wear a face mask?
The answer again is "yes," under Occupational Safety and Health Administration statutes that say:
"Employers may choose to ensure that cloth face coverings are worn as a feasible means of abatement in a control plan designed to address hazards from SARS-CoV-2, the virus that causes COVID-19. Employers may choose to use cloth face coverings as a means of source control, such as because of transmission risk that cannot be controlled through engineering or administrative controls, including social distancing."
If the requirement is for you to wear personal protective equipment, a higher level of protection, then the employer must furnish it (see OSHA's PPE standard 29 CFR 1910.132). But the employer is not required to give you a cloth face mask. PPE's generally must meet standards set by the American National Standards Institute or, in some cases, the Food and Drug Administration.
Do you have a constitutional right not to wear a mask?
The answer is "no."
Governments have the power to regulate in the name of safety. In a pandemic, state governments really are the key players.
The American Bar Association explained:
Under the U.S. Constitution's 10th Amendment and U.S. Supreme Court decisions over nearly 200 years, state governments have the primary authority to control the spread of dangerous diseases within their jurisdictions. The 10th Amendment, which gives states all powers not specifically given to the federal government, allows them the authority to take public health emergency actions, such as setting quarantines and business restrictions.
As a reminder, the 10th Amendment says, "Powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
States also retain significant emergency powers to regulate public safety and health through their own state constitutions and legal precedent dating back to the early 1800s.
The federal government's quarantine powers are limited to those things the feds control, like ports of entry, airspace and such. States each have specific laws that set out who has what authority. Here is a list of each state's rules.
But there is a legal argument around something called "the Preemption Doctrine" (if you really care, see the Supremacy Clause of the Constitution. U.S. Const. art. VI., § 2). The preemption doctrine refers to the idea that a higher authority of law will displace the law of a lower authority when the two authorities come into conflict. Let's say a state says, "We are in an emergency and you have to wear a mask" (as California did). A local government can't come along and say, "Forget what the state said." Generally, then, an act of Congress preempts state constitutions and an FDA ruling preempts state court rulings and so on.
Colorado laws concerning the government quarantine powers:

Authority. County, district or regional health departments have the duty to establish and enforce quarantine or isolation and exercise control over property and people within their jurisdiction as is necessary to protect public health.

Penalties. Anyone who violates or fails to comply with a quarantine order for tuberculosis is guilty of a misdemeanor and can be forced to comply.