Why Do Viruses Change? Everything You Need to Know About COVID-19 Variants

Think back to when the COVID-19 pandemic first started. We all felt unsure and anxious with every new news report. Before long, people began talking about new virus versions, called variants, that were different from the original virus.

Names like Alpha, Delta, and Omicron started showing up everywhere on television and in newspapers. Many people began asking what these variants actually mean, how they form, and whether they are more dangerous than the original virus.

Today, let us talk about this in a simple, friendly way so you can understand everything clearly, alright?

What is a Virus?

Simply put, a virus is a tiny microscopic living agent that you cannot see with your naked eye. In fact, scientists often debate whether viruses are truly alive or not, which makes them quite fascinating.

Viruses cannot survive or reproduce on their own. They must enter a living cell inside an animal or a human body to function. Think of a virus like a burglar breaking into a house and using everything inside that house.

Once the virus enters a cell, it uses that cell's internal parts to make thousands of exact copies of itself. That is how a virus spreads and multiplies inside your body.

How Do Viruses Change through Mutations?

Imagine using a copy machine to make thousands of copies of a single sheet of paper. Do all the copies turn out looking identical to the original sheet? No, they do not.

Sometimes those copies turn out a little bit different. Maybe an extra dot appears, a letter looks slightly crooked, or the paper color is slightly off. Viruses work in a very similar way.

When a virus moves from one cell to another and makes copies of itself, small mistakes sometimes happen during the copying process. In medical science, we call these mistakes mutations.

Mutations are changes in the genetic information or the basic blueprint of the virus. These changes can be very small or quite large and significant.

Not every mutation helps the virus. Some mutations weaken the virus. This other mutations make the virus stronger and help it spread faster.

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What is a Virus Variant?

When one or more mutations happen in a virus, and it creates a new virus family that looks quite different from the original version, we call it a variant.

Simply put, a variant is a close relative of the original virus with a few small differences caused by mutations. Because of these differences, the variant can act differently by spreading faster or causing different symptoms.

The SARS-CoV-2 coronavirus that causes COVID-19 kept going through these changes and mutations. Several new variants appeared during the pandemic, including Alpha, Delta, and Omicron.

Every single one of these variants showed some differences compared to the original virus. For example, the Delta variant made patients much sicker. This the Omicron variant spread very quickly.

How Do Variants Get Their Names?

When scientists discover a new virus variant, it needs a clear name. Without proper names, doctors, researchers, and the general public would face a lot of confusion when discussing the virus.

The World Health Organization (WHO) takes the lead in naming these variants. They use letters from the Greek alphabet, such as Alpha, Beta, Gamma, and Delta.

This organized naming system helps people everywhere understand and discuss the exact same variant clearly without any confusion.

How Do New Variants Differ from the Original Virus?

When a new virus variant forms, it can differ from the original virus in several important ways. Let us look at what those differences are:

• Contagiousness and Spread: Some new variants spread much faster and easier among people than the original virus or earlier versions. This means an infected person can easily pass the virus to several healthy people. You probably remember how fast the Omicron variant spread when it arrived.
• Severity of Illness: When you catch certain variants, your symptoms like fever, cough, body aches, and breathing trouble can differ. Some variants cause more severe illness, require hospital care, or can even lead to death. The Delta variant made many people very sick, and hospitals filled up quickly.
• Response to Vaccines and Medicines: We received COVID-19 vaccines to protect ourselves. These vaccines were built to target the original virus or earlier versions. However, newer variants may not respond as well to those vaccines, meaning vaccine protection can drop a bit. Certain medical treatments for COVID-19 might also not work as well against these new variants. This is why scientists keep a close eye on them.
• Risk of Reinfection: Some variants can infect people who already had COVID-19 and recovered. They can also infect people who received full vaccinations, which is called a breakthrough infection. This happens because mutations in the new variant make it harder for your immune system to recognize it as the same virus, or your previous protection is no longer enough.

Why Do New Variants Form?

This is a very important question. Every time a virus spreads among people, meaning it passes from one person to another, it gets a chance to make thousands of copies of itself.

When the virus makes those copies inside the body, the risk of mutations increases.

Simply put, the more the virus spreads through the community, the higher the chance that mutations will happen and create new variants.

This means that when we control the spread of the virus, we lower the risk of new and potentially dangerous variants forming. This is why wearing face masks, washing your hands often, practicing social distancing, and especially getting vaccinated remain so important. These steps limit the opportunities for the virus to spread.

How Do We Protect Ourselves from These Virus Variants?

This is the most important part of our discussion. In most cases, the same steps we took to protect ourselves from the original coronavirus also protect us against these new variants. Do not worry. We still have control over our health.

"The best part is that no matter what variant appears, we can use simple, everyday habits to keep ourselves and our loved ones safe."

Let us look at what those steps are:

• Get Your COVID-19 Vaccines on Time: This step is extremely important. Scientists constantly update vaccines to match new variants. Getting updated vaccines or booster doses gives you better protection against currently circulating variants. Some people might think, "I already received my previous shots, so why get another?" Think of it like updating the software on your phone. As the virus changes, your vaccine protection needs an update too. While vaccines cannot prevent infection 100 percent of the time, they greatly reduce your risk of severe illness, hospital stays, and death.
• Wash Your Hands Often with Soap: This rule applies to almost every illness, but the COVID-19 pandemic taught us its true value. Handwashing is one of the easiest ways to destroy viruses living on your skin. Wash your hands thoroughly with soap and water for at least 20 seconds, which is about the time it takes to sing "Happy Birthday" twice. If soap is not available, use an alcohol-based hand sanitizer. How many times a day do you touch your face without thinking? If your hands carry the virus, touching your eyes, nose, or mouth lets the virus enter your body easily.
• Get Tested and Stay Home If You Feel Sick: If you feel feverish, have a cough, a runny nose, body aches, a sore throat, or any other COVID-19 symptoms, get a COVID-19 test quickly, such as a rapid antigen test or a PCR test. Staying home and keeping away from other people stops the virus from spreading. Even if you only have a mild cold, thinking it is nothing and going out into public puts others at risk if it turns out to be COVID-19.
• Ensure Good Ventilation Indoors: Opening doors and windows reduces the buildup of virus particles floating in the air. This matters greatly in crowded indoor spaces. If virus-filled air stays trapped in a room, everyone inside has a higher chance of breathing it in, much like sitting in a smoky room. Opening windows lets stale air out and fresh air in, which lowers the virus concentration.