Background: Protective and lasting immunity to viral infections or vaccines are usually achieved through the combined actions of both cellular and humoral immune responses. Although there exists clear evidence supporting ...

"Emerging evidence suggests that the lower expression of SARS-CoV-2 entry factor angiotensin-converting enzyme 2 (ACE2) and transmembrane serine protease 2 (TMPRSS2) in the nasal epithelium of children may contribute to ...

Introduction: Vaccines are the most important and cost-effective public health tools known to control and prevent many infectious diseases. However, concerns regarding the safety and the need for a vaccine and reluctance ...

Introduction The global healthcare systems have been significantly impacted by the coronavirus COVID-19 pandemic. It was a public health emergency that affects many health care services, including primary health care and ...

SARS-CoV-2 is the etiological agent of the ongoing COVID-19 pandemic, which has caused massive losses in human lives and strained global health resources. The ongoing vaccination campaigns in many countries have spurred ...