étable (1) infection (1) immunité (1) delta (1) Development (1) Viral antibodies (1) World health (1) Waves (1) Vaccination (1) Units of measurement (1) Swiss (1) Proportion (1) Population (1) Persons (1) Percentage (1) Organization (1) Human beings (1) Infection (1) Immunoglobulins (1) Immunoglobulin G (1) Immunity (1) Older people (1) Vaccination (1) Population (1) Organization (1) Infections (1) Neutralization (1) cohorte (1) delta (1)