contagious than delta. find this virus is 5- times more contagious than delta. and that is sim - le contagious than delta. and that is simple arithmetic _ contagious than delta. and that is simple arithmetic formula - is simple arithmetic formula which i can understand. so what do we do short of a full lockdown again? what should i be doing, what should everybody be doing, what should everybody be thinking about doing?- be thinking about doing? doctor fel and be thinking about doing? doctor felty and many _ be thinking about doing? doctor felty and many others - be thinking about doing? doctor felty and many others are - be thinking about doing? doctor felty and many others are right| felty and many others are right about boosters but i want to point out that boosters can only be scaled up linearly while the virus will keep increasing exponentially. so short of a lockdown which everybody wants to avoid we still need to do some sort of blanket social measure whether it is a vaccine passport and, by the way, redefining free different fully vaccinated as three shots, whether it is more mass testing and testing requirements and quarantine requirements and quarantine requirements and quarantine requirements and ventilation and opening windows, all of these link measures are needed because only those blanket measures can catch up with it