Citing the Omicron variant as a concern, the California Department of Public Health (CDPH) announced that it is requiring masks to be worn in all indoor public settings, irrespective of vaccine status, for the next four weeks (December 15, 2021 through January 15, 2022). Here is a link to the CA Department of Public Health's updated guidance (as of December 13, 2021) which reflect the latest masking state order.  The order specifies that masks must be worn in all California indoor public settings, irrespective of vaccine status, for the next four weeks (December 15, 2021 through January 15, 2022).  Surgical masks or higher-level respirators are recommended.  For additional information on types of masks, the most effective masks, and ensuring a well-fitted mask, see the CA Public Health Department's "Get the Most Out of Masking"and "CDPH Masking Guidance Frequently Asked Questions."

There are few exemptions to the new masks requirements. Specifically, the guidance provides that the following individuals are exempt from wearing masks at all times:

• Persons younger than two years old. Very young children must not wear a mask because of the risk of suffocation.
• Persons with a medical condition, mental health condition, or disability that prevents wearing a mask. This includes persons with a medical condition for whom wearing a mask could obstruct breathing or who are unconscious, incapacitated, or otherwise unable to remove a mask without assistance.
• Persons who are hearing impaired, or communicating with a person who is hearing impaired, where the ability to see the mouth is essential for communication.
• Persons for whom wearing a mask would create a risk to the person related to their work, as determined by local, state, or federal regulators or workplace safety guidelines.

The author would like to gratefully acknowledge the assistance of Joanne Warriner.