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Search Results for: herd immunity

What’s going on with the rise in SARS-CoV-2 cases in Spain? It sounds really bad.

Biology/Immunity Data and Metrics Infection and Spread

Q: Since they were already hit hard once, shouldn’t they have some herd immunity? A: Spain has seen an alarming increase in confirmed cases since mid-July, even surpassing the U.S. in daily cases per capita. But so far, deaths have only ticked up slightly compared to the height of their epidemic in March and April Read more…

I hear there has been a confirmed case of SARS-CoV-2 re-infection in Hong Kong?! How worried should I be?

Biology/Immunity Infection and Spread

A: Not very. In the words of immunologist Dr. Akiko Iwasaki, “This is no cause for alarm – this is a textbook example of how immunity should work.” What do we know? In a press release yesterday, researchers described the first confirmed case of re-infection in a 33-year old Hong Kong man returning from Spain. Read more…

Maybe this increase in cases is good…. aren’t we getting closer to herd immunity?

Biology/Immunity Data and Metrics Infection and Spread

A: NO and NO! It’s been a while since we touched on herd immunity, so first some quick review. If we think of SARS-CoV-2 infections as sparks, uninfected people are the fuel. The very basic idea of herd immunity is that individuals who are already immune–either through previous infection or a vaccine–act as a “firewall” Read more…

How high a priority is it to get my kid to the pediatrician’s office for routine vaccines? Is it safe to go there?!?

Families/Kids Staying Safe

A: High priority. Super high. *Please* try to keep your kids up-to-date on their vaccination schedule. It’s better for them, and better for all, but there is evidence that coverage is slipping as parents skip or delay well-child visits. Wrapping up our weekend special series on kids + COVID with an up-close look at a Read more…

What actually is herd immunity anyway?

Biology/Immunity Infection and Spread

A: The term “herd immunity,” also sometimes called community immunity, refers to a situation where a lot of people in a population are not susceptible to a virus–either because they have already had it and are unlikely to get it again, or because they’ve been vaccinated. That is to say, their immune systems have been Read more…