delta circulating. this shows that antibodies can drop off and after six to nine months after vaccination, the reason why there's no clear consensus is because the protection of covid—i9 is a moving target and there are several factors are changing and delta is clearly more infectious and transmissible and it has gone through different populations and it causes higher rates of hospitalisation and possibly severe disease, especially of health care systems get overwhelmed and so in the face of rising cases, countries cannot wait for perfect data. secondly, different countries are using different vaccines for the roll—outs. i are using different vaccines for the roll-outs.— are using different vaccines for the roll-outs. i take your oint for the roll-outs. i take your point about _ for the roll-outs. i take your point about the _ for the roll-outs. i take your point about the fact - for the roll-outs. i take your point about the fact that - for the roll-outs. i take your point about the fact that the | point about the fact that the who has to care about the world and governments are to care about their own citizens. it is also true that until everyone is vaccinated or a wider number of people, and we are never safe? there will always be variance and there will always