International Long COVID Awareness Day Date in the current year: March 15, 2026

During the early months of the COVID-19 pandemic, few people considered the long-term effects of the disease because most of the attention was focused on managing current cases, preventing new ones, and coping with the immediate crisis. However, as time went by, it became clear that COVID-19 has serious, often debilitating, long-term effects that can persist for months or even years after the initial infection.

Health problems that persist or develop after an initial period of COVID-19 infection are known as long COVID. It is characterized by numerous symptoms that may come and go, often intensifying after physical or mental exertion. Common symptoms include fatigue, shortness of breath, sleep disturbances, memory impairment, headaches, muscle weakness, and cognitive dysfunction (“brain fog”). Many of these symptoms overlap with those of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS).

The exact nature and causes of long COVID are not fully understood. While some symptoms can be explained by organ damage caused by an acute infection, there are patients with long COVID who have not suffered significant organ damage. Some researchers believe that long COVID may not be a single disease or syndrome but rather an umbrella term for several different conditions that may arise after a SARS-CoV-2 infection.

The prevalence of long COVID varies depending on the severity of the initial infection. It is estimated to be about 50% to 85% among hospitalized adult patients, 10% to 35% among non-hospitalized adult patients, and 8% to 12% among vaccinated adult patients. Children are generally unlikely to develop long COVID. It is estimated that over 400 million people have experienced long COVID.

Since the cause and mechanism of long COVID are not well understood, there are no effective treatments for the syndrome. Management depends on the symptoms and their severity. Most people who first experience symptoms four weeks after the initial infection recover within 12 weeks. Those who still have symptoms after 12 weeks usually have a slow recovery and may experience symptoms for months or years.

In 2023, a group of long COVID patients and caregivers launched the long COVID awareness campaign to increase the global visibility of long COVID, educate the public about its symptoms, encourage patients to seek help, and provide them with support and resources. The campaign also emphasizes the importance of further research into the causes and treatment of long COVID.

International Long COVID Awareness Day is observed on March 15 as part of the campaign. Each year, it has a new theme that highlights one of the symptoms of long COVID. For example, in 2026, the day focused on the impact of long COVID on the cardiovascular system and used the tagline “Long COVID: Every Heartbeat Counts”.