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There's been some question over whether the growth of Omicron vs. Delta is due to increased immune escape, increased intrinsic transmissibility, or both. I'm increasingly seeing commentators suggest that Omicron's performance so far suggests that it's at least as intrinsically transmissible as Delta, in addition to having considerable immune escape properties. Where do you land on this question?

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It's a great question. One day I hope to have data that allow non-speculative answers to it.

Since those data do not presently exist, I land on "It's a great question."

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Not directly about COVID-19, but you wrote, "I’ve mentioned before that I’m on a fitness journey, and now I have very specific goals in mind. I read a piece by a nutritionist recently, who made the point that supplementation of protein is really important when you are trying to both lose weight and build muscle—and it makes sense, since the body will happily lose muscle weight as well as fat when you’re not taking in enough calories."

With my particular mindset, I see "nutritionist" and think, "Person who didn't actually get licensed as a Registered Dietitian," since "nutritionist" is not a professional and licensed designation like "Professional Engineer" or "Licensed attorney." Is this person a nutrition researcher, a registered dietitian, or just someone who made a sign that says "Nutritionist"? Anyone can use that word about themselves, unlike, say, "Real Estate Inspector", which required a government license.

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I wasn't sure, actually, what to call this person. They're from Canada, so I don't know if the term "registered dietitian" even applies there. They had a doctorate in the study of nutrition and active research work in the area.

I too am very skeptical of a lot of nutrition advice, particularly from folks with fluffy titles, but what I read was well sourced and well supported.

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