Cold & Flu

What is cold & flu?

Cold and flu are common respiratory infections caused by viruses that invade your nose, throat, and lungs. While they share similar traits, the flu is generally more intense and hits your body harder. When you catch these viruses, your immune system triggers inflammation to fight back, leading to a build-up of mucus, a swollen throat, and a spike in body temperature.

These infections are highly seasonal and strike people of all ages. While a cold might just slow you down for a few days, the flu can leave you bedbound and exhausted for a week or more.

Symptoms of cold & flu

Symptoms can appear gradually with a cold, but the flu often hits like a freight train. Common signs include a blocked or runny nose, sore throat, persistent cough, and sneezing. With the flu, you will likely also face a high fever ($38^{\circ}\text{C}$ or above), cold shivers, aching muscles, and deep fatigue.

Sometimes, these viral infections can lead to more serious complications like pneumonia or severe chest infections. If you experience sudden chest pain, find it difficult to breathe, start coughing up blood, or feel extremely confused and dizzy, you must seek urgent medical help immediately.

What triggers cold & flu?

The "trigger" for a cold or flu is always a virus, but how it enters your system depends on your environment and daily interactions. These viruses are masters of travel, spreading through tiny droplets in the air or lingering on surfaces.

Common ways you catch a cold or flu include breathing in droplets from someone’s cough or sneeze, touching contaminated surfaces like door handles or handrails and then touching your face, and spending long periods in crowded, poorly ventilated indoor spaces during the winter months.

Managing cold & flu and using treatments

There is no "cure" that kills the cold or flu virus instantly, your immune system has to do the heavy lifting. However, you can manage the symptoms and make the recovery much more bearable with a solid treatment routine. The secret to getting back on your feet is staying hydrated, resting, and using the right medications to mask the pain.

Most plans to fight cold and flu rely on two main types of pharmacy treatments:

First, you use analgesics and antipyretics (like paracetamol or ibuprofen). These dive in to block pain signals and tell your brain to turn down the heat, helping to break a fever and soothe those deep muscle aches.

Second, you use decongestants. These come as sprays or tablets and work by narrowing the swollen blood vessels in your nose. This opens up your airways, drains the pressure from your sinuses, and allows you to breathe clearly again.