Have fever, running nose and cough? Know the difference between Adenovirus, H3N2 and Covid

While fever, runny nose, and fatigue are common symptoms in all three, Dr Umang Agrawal, consultant, Infectious Diseases, at P D Hinduja Hospital, says those infected with adenovirus are likely to have conjunctivitis. The redness of eyes, irritation and watery eyes are more common in adenovirus. “If the patient has high fever for a longer period of time, along with conjunctivitis, it’s likely to be adenovirus. Presence of lymph nodes is another symptom that can be used to confirm the diagnosis.”

For H3N2 however, the differentiating symptom is high fever accompanied with a painful cough that develops into bronchitis, says Dr Vasant Nagvekar, co-director, Infectious Diseases, Sir HN Reliance Foundation Hospital. “In case of H3N2, even when the high-grade fever subsides, patients still complain of a bad cough. In Covid, the nasal secretion, loss of taste and smell are more common.”

Adenovirus is far more virulent and lethal than H3N2 and Covid (Image: Pixabay)

To sum it up, Dr Nagvekar breaks down the differentiating symptoms as follows:

Covid: Mild, self-limiting fever that lasts for a short while accompanied by nasal secretion and a loss of taste and smell

H3N2: High-grade fever which eventually develops into a painful cough that lasts weeks and develops into bronchitis

Adenovirus: High-grade fever that lasts for 7 days, can go up to 10 of even 14 days, often accompanied with conjunctivitis

Prognosis: The road to recovery

How does the treatment differ for the 3 viruses? The general consensus among the medical community regarding viral infections is to take rest and have plenty of fluids. “Our immunity is our first line of defense when it comes to viral infections. From a prognosis point of view, steam inhalation, monitoring your fever and keeping yourself hydrated are all ways you can relieve your symptoms. There is no special line of treatment unless symptoms get worse and one has to get hospitalised,” says Dr Khadapkar. Adding to this, Dr Agrawal says “The 3 viruses are different but their baseline treatment is the same. The treatment is different only when the patient is hospitalised, in which case the doctor will prescribe specific anti-virals which are different for the 3 viruses.”

Warning Signs: When to Seek Help

Back in the first wave of Covid, those who tested positive were given oximeters to monitor their oxygen saturation levels and were advised to visit the emergency room if the levels dropped below 94 per cent. What are the warning signs one should look out for in case of these 3 viruses? Dr Nagvekar breaks it down as follows:

For H3N2 and Covid: Excessive coughing, breathlessness and low oxygen saturation are all warning signs one should look out for. Visit your doctor or emergency room if these symptoms persist.

For Adenovirus: Excessive fever and severe respiratory distress should be enough to ring an alarm in this case. Consider seeking medical help if these symptoms last for a long time

Precautions: Keeping virus at bay

Despite multiple viral outbreaks across the country, Dr Nagvekar  advises against the use of immunity boosters and immunity boosting pills. Instead, he stresses on following standard practices such as eating and hydrating well and getting an adequate amount of rest, which will help keep the infection at bay. Dr Agrawal stresses on the importance of vaccination. “I cannot stress enough on the importance of getting vaccinated. It is heartbreaking to see children lose their lives over a vaccine-preventable disease. No tonic or immunity boosting food will keep you safe like a vaccine dose can.” Dr Nagvekar, meanwhile, recommends going for low-fat and low-spice food while maintaining a healthy eating regime during the flu season.