Serology
Auvergne-Rhone-Alpes
Effectiveness of vaccine combination
Científicos franceses demuestran que la vacunación primaria con dos vacunas diferentes sería más eficaz que la vacunación con dos vacunas idénticas.
Institut Català de la Salut, Spain
COVID-19 immunity in healthcare professionals
Determining whether there is protection against reinfection is important for controlling healthcare workers implications during the pandemic due to their continous professional contact with COVID-19 patients
Catalunya Central Health region, Spain
COnV-ert study, convalescent plasma to stop COVID-19
Early administration of convalescent plasma in people over 50 years of age with mild to moderate COVID-19 disease may slow disease progression and decrease the severity of symptoms.

Andorra
Mass SARS-CoV-2 Serological Screening in Andorra
This study aims to estimate the prevalence of antibodies against SARS-CoV-2 and help improve the prediction of infectious diseases and increase biosecurity in the Principality of Andorra.
France
SAPRIS-SERO Study
SAPRIS-SERO is a study to estimate the seroprevalence of SARS-CoV-2 infection in the epidemiological cohorts Constances, E3-E4N, NutriNet-Santé and Elfe-Epipage2 in France.
Technische Universität München, Germany
CoViproteHCt
Identifying true markers of protective immunity will allow for the identification of individuals, in particular healthcare personnel working with COVID-19 patients and in other critical areas protected from re-infection.
Catalonia, Spain
COVICAT Study
The COVICAT study aims to evaluate the evolution of the incidence of SARS-CoV-2 coronavirus infection in the Catalan population over a 12-month period.
Assistance Publique des Hopitaux de Paris, France
Convalescent plasma therapy and COVID-19
Convalescent plasma with anti-SARS-CoV-2 antibodies appears to be a very promising approach in the context of protracted COVID-19 symptoms in patients unable to mount a specific humoral response to SARS-CoV-2.
SAAS, Andorra
COVonco Study
Join the COVonco study and help understand the impact of COVID-19 in oncology.

France
EpiCOV
The EpiCOV project aims to provide a global and scientifically reliable mapping of the immune status of the population in France through serological tests and questionnaires.
Imperial College London et al., United Kingdom
REACT-2.5: Seroprevalence of SARS-CoV-2 antibodies
This cross-sectional study estimates SARS-CoV-2 IgG antibody seroprevalence in the community in England using self-administered LFIAs.
Imperial College London et al., United Kingdom
REACT-2.4: Usability of LFIA Self-testing in Key Workers
Study that assesses whether LFIAs should be used as a self-administered test among key workers or whether better performance is obtained if they attend a central clinic facility.