How is public health a developing area of focus?

Public health can be defined as “the scientific knowledge of avoiding disease, improving life, and encouraging health via the coordinated efforts and informed decisions of communities, organizations, government, and individuals.”
Public health works to protect the health of the people and the surrounding communities, study, work, and play.
While a doctor heals individuals who are sick, public health serves to keep people from being sick or wounded in the first place.

What is the purpose of public health? 

In comparison to medical professionals such as doctors and nursing staff, who focus solely on providing treatment once they become sick or injured, public health officials work to prevent problems from arising or recurring by implementing training programs, suggestions, prescribing services, and performing research. Additionally, public health strives to reduce health inequities. Promoting health care equality, efficiency, and availability is a significant component of public health.
Public health is concerned with the complete number of health conditions and well-being, not only the removal of specific diseases. Many activities, such as health campaigns, are aiming at certain audiences. Personal services to individuals, such as vaccines, mental health counseling, or health advice, are also included in public health services.
Here is some WHO-Recommended Practical Health Advice to Get You Started on the Path to a Healthier Lifestyle.

• Eat nutritious food, a variety of foods including fruits, veggies, pulses, nuts, and whole-grain products. Adults should consume at least five portions of fruit and veggies (400g) every day.
• Reduce the intake of unhealthy fats.
  The number of fats consumed should be less than 30 percent of overall energy consumption. This will aid in the prevention of weight gain and non-communicable diseases. There are several kinds of fats, however, unsaturated fats which is over saturated and trans fats.
• Do not smoke.
  Tobacco usage leads to non-communicable diseases such as lung cancer, cardiovascular disease, and stroke. Tobacco kills not just active smokers, but also non-smokers via second-hand inhalation.
• Only drink clean water.
  Water-borne illnesses such as cholera, diarrhea, hepatitis A, typhoid, and polio is developing due to contaminated drinking water. At least 2 billion people in the world consume polluted feces-infected water.
• Only take prescribed meds as recommended.
  Resistance to antibiotics is one of the major public health problems. When antibiotics lose their effectiveness, bacterial infections become more difficult to cure, resulting in higher medical expenditures, longer hospitalization, and higher death rates. Antibiotics are decreasing their effectiveness as a result of misuse and overuse in people and animals. Make sure to take antibiotics if a certified health expert has prescribed them.
• Practice safe sex.
  Taking care of your sexual health is essential to your entire health and well-being. To avoid HIV and other sexually transmitted illnesses such as gonorrhea and syphilis, practice safe sex.
• Prevent mosquito bites
  Mosquitoes are one of the most dangerous critters on the planet. Mosquitoes spread diseases including chikungunya, dengue virus, malaria, and filariasis, which continue to harm.

Statistics on Health
Over 95 percent of the worldwide people suffer from health issues. According to the public health foundation of India, just 4.3 percent of people have no health concerns. Too many people suffer and die from avoidable diseases, just so many people are forcing into poverty in order to pay for the medical care out of their own pockets, and too many others are unable to get the health care they require.