VIRUS – Infectious agents that will impair your bodily functions. Unlike bacteria, it is not detectable by plain sight or smell. Viruses are much smaller than bacteria and can’t reproduce or multiply without a host. It only duplicates itself after locating a host. The symptoms of viral and bacterial illnesses are sometimes similar. A doctor needs to determine the underlying cause of an illness based on the patient’s symptoms and other factors. Viruses can be transmitted in a variety of methods. Some viruses can spread through contact, saliva, or even air. Insects including ticks and mosquitoes can act as “vectors” transmitting a virus from one host to another.

ODOUR – Indicator of wayward bacteria. When you smell something unpleasant, it is a telltale sign that there could be over populated bacteria causing the odour. Bacteria are microscopic single-celled organisms classified as prokaryotes. They thrive in diverse environments which can include soil, ocean or even in the human gut. Sometimes they assist us by curdling milk into yogurt, or helping digestion. Other times they can be destructive, causing diseases like pneumonia and MRSA which we call pathogenic bacteria. Some odour could also be caused by harmful chemical, example formaldehyde from new furniture. Whatever the unpleasant odour is, it only tells us that corrective measures should be taken.

MOULD – Fungi; micro-colonies that might affect one’s health. Mould has been in existence in every part of our world for millions of years. When the environment possesses high moisture, it encourages mould growth. This is especially true in tropical environments such as Singapore where the annual average for relative humidity ranges from 64% ~ 96%, with an estimated average to at 80% humidity. Due to the frequent use of air-conditioning coupled with high humidity, it is easy to create an environment that promotes mould growth. When mould clusters develop into a mass, they could trigger asthma attacks or cause respiratory issues.