Emergence: The origins of the COVID-19 pandemic.

Global outbreak: Rapid spread of the novel coronavirus.

Pandemic declaration: WHO's recognition of COVID-19's severity.

Lockdowns and restrictions: Measures to control transmission.

Strain identification: Identifying and tracking different variants.

Vaccine development: Scientific breakthroughs in immunization efforts.

Healthcare system strain: Overwhelmed hospitals and medical resources.

Economic impact: The global recession and job losses.

Mask mandates and social distancing: Public health measures implemented.

Long COVID: Persistent symptoms and health complications post-infection.

Origin: The mysterious beginnings of the coronavirus.