In this issue:
Bivalent mRNA vaccine and preventing COVID-19 hospitalisation
SARS-CoV-2 booster induces de novo B cell response in humans
Waning of humoral COVID-19 response and obesity
Nirmatrelvir–ritonavir use for COVID-19 outpatients
Timing and sequence of vaccination against COVID-19 and influenza
SARS-CoV-2 3CL protease mutations and resistance
Anticoagulant use in patients with COVID-19 pneumonia
Antiviral use to prevent the development of long COVID
Antiviral use to prevent the risk of hospitalisation
Mask-wearing and transmission in schools
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