In a talk you gave four months ago, you said
“The most likely duration of immunity to a respiratory virus like SARS CoV-2 is multiple years. Why do I say that? We actually have the data for a virus that swept through parts of the world seventeen years ago called SARS, and remember SARS CoV-2 is 80% similar to SARS, so I think that’s the best comparison that anyone can provide.
“The evidence is clear: These very clever cellular immunologists studied all the people they could get hold of who had survived SARS 17 years ago. They took a blood sample, and they tested whether they responded or not to the original SARS and they all did; they all had perfectly normal, robust T cell memory. They were actually also protected against SARS CoV-2, because they’re so similar; it’s cross immunity.
“So, I would say the best data that exists is that immunity should be robust for at least 17 years. I think it’s entirely possible that it is lifelong. The style of the responses of these people’s T cells were the same as if you’ve been vaccinated and then you come back years later to see if that immunity has been retained. So I think the evidence is really strong that the duration of immunity will be multiple years, and possibly lifelong.”
In other words, previous exposure to SARS – that is, a variant similar to SARS CoV-2 – bestowed SARS CoV-2 immunity.
“For example, if someone wished to harm or kill a significant proportion of the worlds population over the next few years, the systems being put in place right now will enable it.
“It’s my considered view that it is entirely possible that this will be used for massive-scale depopulation.“