Yn ail, mae'r JCVI wedi argymell cynnig dos atgyfnerthu COVID-19 i:Bob plentyn a pherson ifanc 16 i 17 oedPlant a phobl ifanc 12 i 15 oed sydd mewn grŵp risg clinigol neu sy'n gyswllt cartref i rywun sy’n imiwnoataliedigPlant a phobl ifanc 12 i 17 oed sy’n ddifrifol imiwnoataliedig ac sydd wedi cael trydydd dos sylfaenol.
Secondly, the JCVI has recommended offering a COVID-19 booster dose to:All children and young people aged 16 to 17 yearsChildren and young people aged 12 to 15 who are in a clinical risk group or who are a household contact of someone who is immunosuppressedChildren and young people aged 12 to 17 years who are severely immuno-compromised and who have had a third primary dose.