5 things we know and still don’t know about COVID, 5 years after it appeared

Sat Jan 04 09:10:00 UTC 2025: ## Five Years After COVID-19 Emerged: A Pandemic’s Lingering Impact

**New York, NY** – Five years after the initial outbreak in Wuhan, China, the COVID-19 pandemic continues to cast a long shadow on global health. While the virus is less deadly than in its early stages and no longer a leading cause of death in many places, its impact remains significant.

The virus’s origin remains a mystery, despite theories suggesting a zoonotic transfer from animals to humans at a Wuhan market. The lack of conclusive evidence, complicated by political tensions and potential withholding of information, continues to hinder a full understanding of its emergence.

The pandemic’s death toll is staggering, with estimates suggesting at least 20 million fatalities globally, far exceeding official reports. Although COVID-19 vaccines have proven highly effective in reducing severe illness, hospitalizations, and deaths, their protection against milder infection wanes over time, necessitating regular updates. The need for ongoing booster shots has led to public frustration. Research is underway to develop more effective vaccines, such as nasal sprays.

The virus’s evolution has also posed challenges. Variants like Delta and Omicron spread rapidly, although Omicron proved less severe on average. Currently, a subvariant of Omicron remains dominant in many areas. While existing treatments and vaccines remain effective, the constant emergence of new variants necessitates continued monitoring and adaptation.

Perhaps the most enduring impact is the emergence of long COVID, a debilitating condition affecting millions. Characterized by persistent fatigue, brain fog, pain, and cardiovascular problems, long COVID can last for months or even years, with the underlying cause and effective treatments still largely unknown. Vaccination has shown to reduce the risk.

The World Health Organization (WHO) stresses that COVID-19 remains a present concern, underscoring the need for continued vigilance and research to manage the virus and its lasting effects. The pandemic serves as a stark reminder of the fragility of global health systems and the importance of preparedness for future outbreaks.