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Occupational safety and health (OSH)



Occupational safety and health (OSH), also commonly referred to as occupational health and safety (OHS), occupational health, or workplace health and safety (WHS), is a multidisciplinary field concerned with the safety health , and welfare of people at work .

The goals of occupational safety and health programs include to foster a safe and healthy work environment. OSH may also protect co-workers, family members, employers, customers, and many others who might be affected by the workplace environment. In the United States, the term occupational health and safety is referred to as occupational health and occupational and non-occupational safety and includes safety for activities outside of work.

In common-law jurisdictions, employers have a common law duty to take reasonable care of the safety of their employees. Statute law may in addition impose other general duties, introduce specific duties, and create government bodies with powers to regulate workplace safety issues: details of this vary from jurisdiction to jurisdiction.

As defined by the World Health Organization (WHO) “occupational health deals with all aspects of health and safety in the workplace and has a strong focus on primary prevention of hazards.” Health has been defined as “a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.” Occupational health is a multidisciplinary field of healthcare concerned with enabling an individual to undertake their occupation, in the way that causes least harm to their health.

Since 1950, the International Labour Organization (ILO) and the World Health Organization (WHO) have shared a common definition of occupational health. It was adopted by the Joint ILO/WHO Committee on Occupational Health at its first session in 1950 and revised at its twelfth session in 1995. The definition reads:

“The main focus in occupational health is on three different objectives:

(i) the maintenance and promotion of workers’ health and working capacity;

(ii) the improvement of working environment and work to become conducive to safety and health and

(iii) development of work organizations and working cultures in a direction which supports health and safety at work and in doing so also promotes a positive social climate and smooth operation and may enhance productivity of the undertakings.

The concept of working culture is intended in this context to mean a reflection of the essential value systems adopted by the undertaking concerned. Such a culture is reflected in practice in the managerial systems, personnel policy, principles for participation, training policies and quality management of the undertaking.”

— Joint ILO/WHO Committee on Occupational Health

Those in the field of occupational health come from a wide range of disciplines and professions including medicinepsychologyepidemiologyphysiotherapy and rehabilitation, occupational therapyoccupational medicinehuman factors and ergonomics, and many others. Professionals advise on a broad range of occupational health matters. These include how to avoid particular pre-existing conditions causing a problem in the occupation, correct posture for the work, frequency of rest breaks, preventative action that can be undertaken, and so forth.

Occupational health should aim at: the promotion and maintenance of the highest degree of physical, mental and social well-being of workers in all occupations; the prevention amongst workers of departures from health caused by their working conditions; the protection of workers in their employment from risks resulting from factors adverse to health; the placing and maintenance of the worker in an occupational environment adapted to his physiological and psychological capabilities; and, to summarize, the adaptation of work to man and of each man to his job.

Although work provides many economic and other benefits, a wide array of workplace hazards also present risks to the health and safety of people at work. These include but are not limited to, “chemicals, biological agents, physical factors, adverse ergonomic conditions, allergens, a complex network of safety risks,” and a broad range of psychosocial risk factors. Personal protective equipment can help protect against many of these hazards.

Physical hazards affect many people in the workplace. Occupational hearing loss is the most common work-related injury in the United States, with 22 million workers exposed to hazardous noise levels at work and an estimated $242 million spent annually on worker’s compensation for hearing loss disability. Falls are also a common cause of occupational injuries and fatalities, especially in construction, extraction, transportation, healthcare, and building cleaning and maintenance. Machines have moving parts, sharp edges, hot surfaces and other hazards with the potential to crush, burncutshearstab or otherwise strike or wound workers if used unsafely.

Biological hazards (biohazards) include infectious microorganisms such as viruses and toxins produced by those organisms such as anthrax. Biohazards affect workers in many industries; influenza, for example, affects a broad population of workers.[16] Outdoor workers, including farmers, landscapers, and construction workers, risk exposure to numerous biohazards, including animal bites and stings, urushiol from poisonous plants, and diseases transmitted through animals such as the West Nile virus and Lyme disease. Health care workers, including veterinary health workers, risk exposure to blood-borne pathogens and various infectious diseases, especially those that are emerging.

Infectious Diseases

· With many employees traveling to and from international destinations, monitoring and controlling infectious diseases has become an important safety issue.

Employers can take steps to prevent the entry or spread of infectious diseases into their workplaces. These steps include:

1. Closely monitor Centers for Disease Control and Prevention (CDC) travel alerts about health concerns. Access this information at

2. Provide daily medical screenings for employees returning from infected areas.

3. Deny access to your facility for 10 days to employees or visitors returning from affected areas.

4. Tell employees to stay home if they have a fever or respiratory system symptoms.

5. Clean work areas and surfaces regularly.

6. Stagger breaks. Offer several lunch periods to reduce overcrowding.

7. Emphasize the importance of frequent hand washing and make hand sanitizers easily available.

Dangerous chemicals can pose a chemical hazard in the workplace. There are many classifications of hazardous chemicals, including neurotoxins, immune agents, dermatologic agents, carcinogens, reproductive toxins, systemic toxins, asthmagens, pneumoconiotic agents, and sensitizers. Authorities such as regulatory agencies set occupational exposure limits to mitigate the risk of chemical hazards. An international effort is investigating the health effects of mixtures of chemicals. There is some evidence that certain chemicals are harmful at lower levels when mixed with one or more other chemicals. This may be particularly important in causing cancer.

Psychosocial hazards include risks to the mental and emotional well-being of workers, such as feelings of job insecurity, long work hours, and poor work-life balance. A recent Cochrane review – using moderate quality evidence – related that the addition of work-directed interventions for depressed workers receiving clinical interventions reduces the number of lost work days as compared to clinical interventions alone. This review also demonstrated that the addition of cognitive behavioral therapy to primary or occupational care and the addition of a “structured telephone outreach and care management program” to usual care are both effective at reducing sick leave days.