Two vaccine doses boost antibody levels in the airways after COVID-19
Antibodies in the airways quickly wane after SARS-CoV-2 infection, but vaccination results in a strong increase in antibody levels, especially after two doses, according to a new study from Karolinska Institutet in Sweden published in the journal JCI Insight. The results suggest that having a second dose of vaccine also after recovering from COVID-19 may be important for protecting against re-infection and to prevent transmission.“What makes the study unique is that we have looked at samples from both blood and airways, which has given us new knowledge of the local immune response where the