Question: What can my husband do to keep from getting the virus if he works in the maintenance area at the airport?

Answer passage (source: CDC):
page_title: What Aircraft Maintenance Workers Need to Know about COVID-19
section_headers: As an aircraft maintenance worker, how can I protect myself?
section_content: As an aircraft maintenance worker, you could be exposed to COVID-19 in
situations such as when you have close contact with someone with COVID-19,
when you touch surfaces while repairing aircraft interiors and lavatories that
have been touched or handled by a person with COVID-19, or by touching your
mouth, nose, or eyes.

Limit close contact with others by maintaining a distance of at least 6 feet, when possible.
Practice routine cleaning and disinfection of frequently touched surfaces, following the directions on the cleaning product’s label.
Use gloves whenever you touch surfaces contaminated by body fluids.
Proper hand hygiene is an important infection control measure. Wash your hands regularly with soap and water for at least 20 seconds. If soap and water are not readily available, use an alcohol-based hand sanitizer containing at least 60% alcohol.
Key times to clean hands in general include: 
Before, during, and after preparing food
Before eating food
After using the toilet
After blowing your nose, coughing, or sneezing


Additional times to clean hands on the job include: 
Before and after work shifts
Before and after work breaks
After touching frequently touched surfaces
After removing any personal protective equipment (PPE)
After performing maintenance tasks such as handling untreated human waste
After putting on, touching, or removing cloth face coverings


Avoid touching your eyes, nose, or mouth.

Recommendations based on work tasks:
Interior Work:

Wear your normally required PPE, if applicable, when making repairs in the passenger cabin area.
Do not use compressed air or water sprays to clean surfaces contacted by passengers, as these techniques may aerosolize potentially infectious material.
If cleaning is required before you make repairs, first review CDC cleaning guidance for Airlines and Airline Crew: Coronavirus Disease 2019 (COVID-19) and contact your employer for additional guidance.

Air Filter Replacement:

Wear your normally required PPE, if applicable.
Follow the manufacturer’s filter replacement schedule.
When replacing air filters (including HEPA filters): 
Avoid hitting, dropping, or shaking the filter.
Do not use compressed air to clean a filter. This will keep materials in the filter from becoming airborne.
Dispose of the used filter and gloves in a sealed plastic bag.
Clean your hands when the task is finished.



Waste and Wastewater Handling:

Follow standard practices when performing work tasks that could expose you to untreated waste and wastewater. Untreated waste and wastewater colored blue (i.e., a deodorizing agent in some aircraft toilets) are not disinfected and have the potential to be infectious. Take these steps to protect yourself: 
Avoid causing or creating a fine spray of untreated waste material.
Do not vent aircraft vacuum waste tanks inside hangars if the aircraft’s external venting system is not equipped with a filter to prevent the spread of germs from the waste. If you must vent the vacuum waste tanks inside a hangar, use a technique that exhausts the air outside the hangar.
Use employer-provided PPE when handling human waste or sewage: 
Splash-proof face shield
Liquid-repellent coveralls
Waterproof gloves
Rubber boots
Remove PPE after use following your employers’ instructions, and immediately wash your hands with soap and water for at least 20 seconds.




Reviewer feedback on this answer:
It provides information for the exact job mentioned. It's a very thorough answer.
This is a thorough and exhaustive list of things that one can do that is related to the question for those working in the maintenance area.

Reviewer ratings:
Excellent
Excellent

Answer passage (source: CDC):
page_title: What Aircraft Maintenance Workers Need to Know about COVID-19
section_headers: What steps should my employer take?
section_content: Employers of aircraft maintenance workers should develop a COVID-19 health and
safety plan to protect employees. This plan should be shared with you and your
coworkers. Employers should:

Take steps to help prevent the spread of COVID-19 if an employee is sick. Actively encourage sick employees to stay home. Sick employees should not return to work until the criteria to discontinue home isolation are met, in consultation with healthcare providers and state and local health departments.
Provide information on whom to contact if employees become sick.
Implement flexible sick leave and supportive policies and practices. Consider drafting non-punitive emergency sick leave policies if sick leave is not offered to some or all employees.
Designate someone to be responsible for responding to COVID-19 concerns. Employees should know who this person is and how to contact them.
Provide employees with accurate information about COVID-19, its symptoms, how it spreads, and risk of exposure.
Provide training on proper hand washing practices and other routine infection control precautions. This will help prevent the spread of many diseases, including COVID-19.
Provide employees with appropriate PPE when necessary and provide training on using the PPE and ensuring it fits correctly.
Provide employees with access to soap, clean running water, and drying materials, or alcohol-based hand sanitizers containing at least 60% alcohol at their worksite.
Provide disposable disinfecting wipes so that commonly touched surfaces can be wiped down by employees as needed. Provide products to disinfect that meet EPA’s criteria for use against SARS-CoV-2external icon, diluted household bleach solutions, or alcohol solutions with at least 70% alcohol, and are appropriate for the surface. Provide employees training on manufacturer’s directions for use.
Provide tissues and no-touch disposal receptacles for employees to use.
Frequently clean workstations, such as areas within maintenance shops, employee break rooms, rest areas, and other common areas.
Place posters that encourage staying home when sick, covering coughs and sneezes, and washing hands often at the entrance to the workplace and in other workplace areas where they are likely to be seen.
Follow all applicable worker safety and health federal regulations and public health agency guidelines.


Reviewer feedback on this answer:
It mentions the job, but the advice was for the employers instead of the workers.
While this relates to the topic of maintenance workers, it strictly only goes over what an employer can do, and not what employees can do.

Reviewer ratings:
Could be Improved
Could be Improved

Answer passage (source: CDC):
page_title: What Transit Maintenance Workers Need to Know About COVID-19
section_headers: As a transit maintenance worker, how can I protect myself?
section_content: For transit maintenance workers, potential sources of exposure include close
contact with a coworker with COVID-19, contacting surfaces touched or handled
by a person with COVID-19, or by touching your mouth, nose, or eyes.

Limit close contact with others by maintaining a distance of at least 6 feet, when possible.
Avoid touching surfaces often touched by transit passengers.
Practice routine cleaning and disinfection of frequently touched surfaces following the directions on the cleaning product’s label.
Proper hand hygiene is an important infection control measure. Wash your hands regularly with soap and water for at least 20 seconds. If soap and water are not readily available, use an alcohol-based hand sanitizer containing at least 60% alcohol.
Key times to clean hands in general include: 
Before, during, and after preparing food
Before eating food
After using the toilet
After blowing your nose, coughing, or sneezing


Additional times to clean hands on the job include: 
Before and after work shifts
Before and after work breaks
After touching surfaces in the vehicles frequently touched by passengers
After putting on, touching, or removing cloth face coverings


Avoid contact with body fluids.
Avoid touching your eyes, nose, or mouth with unwashed hands.


Reviewer feedback on this answer:
It talks about the job that was asked about. The answer is not too long, and it is also thorough.
While this mentions transit workers, this answer does not specifically apply to those working in airports.

Reviewer ratings:
Excellent
Acceptable