Diverging humoral and cellular immune responses due to Omicron-a national study from the Faroe Islands.

The immunity following infection and vaccination with the SARS-CoV-2 Omicron variant is poorly understood. We investigated immunity assessed with antibody and T-cell responses under different scenarios in vaccinated and unvaccinated individuals with and without Omicron infection. We found that the humoral response was higher among vaccinated-naïve than unvaccinated convalescent.

Factors influencing the immune response over 15 months after SARS-CoV-2 infection: A longitudinal population-wide study in the Faroe Islands.

Background: The durability of SARS-CoV-2 antibody response and the resulting immunity to COVID-19 is unclear.

Objectives: To investigate long-term humoral immunity to SARS-CoV-2.

Methods: In this nationwide, longitudinal study, we determined antibody response in 411 patients aged 0-93 years from two waves of infections (March to December 2020) contributing 1063 blood samples.

Clinical characteristics of the Omicron variant - results from a Nationwide Symptoms Survey in the Faroe Islands.

Objectives: Omicron appears to lead to a milder illness for patients compared with previous COVID-19 variants. However, not all infected with Omicron would describe their illness as mild. In this study, we investigate the experienced severity and symptoms of the Omicron variant.

Low Seroprevalence among Undetected COVID-19 Cases, Faroe Islands, November 2020.

We conducted a second nationwide severe acute respiratory syndrome coronavirus 2 seroprevalence study in the Faroe Islands during November 2020. We found crude seroprevalence was 0.3% and prevalence was 0.