VIRUSES are no stranger to humans. After all, they are responsible for a range of human diseases like the Acquired Immune Deficiency Syndrome (AIDS), the Ebola haemorrhagic fever, hepatitis, herpes, the common cold, and a host of other diseases.
Viruses are around 1,000 times smaller than bacteria, and can only be seen under electron microscopes. A virus particle, or virion, consists of nucleic acid (either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) and a coat of protein, while some have an added lipid membrane (often called the envelop, which surrounds the protein coat in some viruses). Viruses with the envelope are called enveloped viruses (the coronavirus, or CoV being among them), while those without are referred to as naked viruses.
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