you 77% protection from meeting hospital treatment and tested with a month after having a booster. it s roughly every six months people may be required to have a booster. at the moment there is a spring booster roll out aimed at the over 75 of care home residence and people over 12 with a weakened immune system and these groups are encouraged to go ahead and have their booster and get protected. as i say this is interim advice for the whole of the uk. developed nations get to choose whether to implement it or not. that idea is to give them enough warnings today to prepare and plan for another booster roll out campaign going into the winter when viruses are in speculation and people more vulnerable the nhs is at its busiest. we don t know what s going to happen, if they would be another variant. things could change whether it s my severe and or or not so the timing and the criteria of who should get the shots may change.