cystic fibrosis(31) COVID-19(29) fibrosis(26) Patient(22) SARS-CoV-2(20) Cystic(20) coronavirus(12) positive(12) risk(9) Vaccine(9) therapy(9) median(8) dose(8) hospital(8) SARS-COV-2 infection(8) country(8) International(7) CFTR(7) reported(7) hospitalised(7) severe COVID-19(7) died(7) Clinical characteristics(7) Hospitalized(7) reduced(7) body mass index(7) IgG antibody(7) pandemic(6) Clinical course(6) vaccine.(6)