COVID-19 remains a significant public health concern, despite the end of the emergency phase of the pandemic. According to WHO, nearly 780 million cases and more than 7.1 million deaths have been reported worldwide since December 2019, while the actual burden is likely higher.
SARS-CoV-2 continues to circulate globally, causing hospitalizations and deaths, especially among older adults, immunocompromised patients and people with chronic diseases. This highlights the need for accessible diagnostics and monitoring of immune response after infection or vaccination.