Health Science Simplified

As countries continue to administer various COVID-19 vaccines to their citizens, the words "herd immunity" are increasingly thrown around in many circles. Let us examine the meaning and benefits of herd immunity. What is herd immunity? A.W Hedrich , a researcher studying the spread of measles in the United States between 1900 and 1931 observed that as more infected children recovered from measles and became immune to the disease, the rate of transmission of measles decreased and the children who had no immunity were protected. He then coined the term "herd immunity" to describe this phenomenon. Credit - Wikipedia Herd immunity, also known as community protection , can be defined as a form of indirect protection from some infectious diseases when a sufficient proportion of a population has...

Air pollution : A silent killer. We are all exposed to air pollution on a regular basis. The World Health Organisation (WHO) estimates that at least 9 in 10 people globally breathe air containing pollutants that exceed levels stipulated in WHO guidelines. The WHO also estimates that indoor and outdoor (ambient) air pollution kills at least 7 million people worldwide every single year. Those are scary numbers, which make you wonder why alot is not being done to drastically improve the quality of air we breathe. Outdoor or ambient air pollution is estimated to cause 4.2 million deaths globally every year. Most deaths from outdoor air pollution is primarily due to exposure to particulate matter (PM) in the air. Particulate matter is a complex mixture of solid and liquid particles of organic and inorganic substances suspended in the air. The major components of particulate matter include ammonia, black carbon, mineral dust, sulfates and wa...

The world is still reeling from the impact of the novel coronavirus (SARS-CoV2) which has caused over a million deaths globally, with millions more infected. The economic consequences of COVID-19 have been just as severe. Many countries have shut down entire industries, millions of people have been laid off from their jobs and are unable to cater for themselves and their families. Trading within and between nations has slowed down to a trickle although things are beginning to pick up. Some experts opine that it would take a few years for the world to fully recover from the economic and social effects of the pandemic. There is indeed a good chance that some aspects of the society may have been altered forever. As the death toll from COVID-19 rose however,so did the resolve of researchers and health professionals around the world. They were, and are still searching for the quickest and safest solutions to this publ...

Diabetes mellitus(DM) is a chronic metabolic disease with increasing prevalence all over the world. The disease is classified into 2 main types : Type 1 and Type 2 Diabetes mellitus. According to the International Diabetes Foundationa an estimated 436 million people are currently living with type 2 DM.In 2011 that estimate was 366 million. The IDF also reports that around 10% of global health expenditure is spent on Diabetes -- a whopping USD 60 billion annually. The above figures are projected to get much higher over the next decade especially in urban areas. Growing urbanisation and lifestyle habits such as higher calorie intake, increasing consumption of processed foods and sedentary lifestyles are pushing the up figures. "The prevalence of type 2 Diabetes mellitus in urban areas is 10.8% compared to the lower prevalence of 7.2% in rural areas" --IDF. Type 2 DM is characterized by high blo...