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Céline Gounder, MD, ScM, FIDSA Profile picture
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14 Jan, 3 tweets, 1 min read
1/ I got my 2nd dose of COVID vaccine on Tuesday, but I'm still wearing a mask. Why?
2/ It takes ~2 weeks after 2nd dose to reach full immunity. Those side-effects? fevers/chills/fatigue? That's your body working to create an immune response. And that work takes time.
3/ We know the COVID vaccines prevent disease and death. We don't know if the COVID vaccines prevent low-grade infection and transmission to others. So it's really important we all keep masking up until we have more data.

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More from @celinegounder

Céline Gounder, MD, ScM, FIDSA Profile picture
10 Jan
1/ Sadly, "natural herd immunity" hasn't worked out so well for Sweden or the USA:
nytimes.com/live/2021/01/0…
Coronavirus cases & deaths continue to rise in both countries.
2/ Sweden passed an emergency law on Friday allowing the government to limit the number of people in shops, businesses & public places and to fine individuals for breaking virus rules. nytimes.com/live/2021/01/0…
3/ The only way to reach herd immunity is through vaccination. We have 2 safe and effective vaccines with emergency use authorizations from @US_FDA.
Read 5 tweets
Céline Gounder, MD, ScM, FIDSA Profile picture
10 Nov 20
My people in Tamil Nadu, India are very proud: Image
Image
Image
Read 6 tweets
Céline Gounder, MD, ScM, FIDSA Profile picture
26 Oct 20
1/ THREAD on Sweden & "natural herd immunity":
COVID cases RISING in Sweden since August/September, as is the case across Europe. DEATHS are a LAGGING indicator (~6-8+ weeks after infections). It is likely Sweden will experience another SURGE in DEATHS in the coming weeks.
@celinegounder 2/ Like the U.S., Sweden FAILED to suppress virus transmission over the summer, in contrast to Sweden’s neighbors, like Norway and Germany. That was DESPITE many Swedes leaving urban and suburban areas for remote cabins in the summer.
@celinegounder 3/ Italy was hit hard and early. England initially took a herd immunity approach to the pandemic (the tallest peak). The U.S. and Sweden have almost identical curves. Sweden’s neighbors Norway and Germany sustained much smaller losses from COVID.
Read 32 tweets
Céline Gounder, MD, ScM, FIDSA Profile picture
16 Oct 20
1/ LOVELY in THEORY, but herd immunity WILL NOT work:
POTUS "vowed to shield America’s senior citizens from the coronavirus & directed them to stay home amid the pandemic" politico.com/news/2020/10/1…
2/ Measles has infected humans since at least the 9th century. Smallpox? Since the 3rd century BC. Both are respiratory viruses, like coronavirus.
3/ We have yet to eradicate measles via natural infection & immunity. We only reached herd immunity to smallpox with a vaccine & a MASSIVE eradication effort. When you let respiratory viruses like measles, smallpox, and coronavirus spread naturally, you get big epidemic spikes: Smallpox was eradicated in 1977 after a massive worldwide er
Read 12 tweets
Céline Gounder, MD, ScM, FIDSA Profile picture
7 Oct 20
1/ Late last month, Dr. Bill Foege—@CDCgov Director '77-83, central figure in smallpox eradication, former Task Force for Global Health & Carter Center leader, Senior Fellow at the @gatesfoundation, and a devout Christian—sent this plea to @CDCDirector Bob Redfield.
2/ We are witnessing a "colossal failure of the public health response in this country." The result of "incompetence and illogic." The @CDCgov is the preeminent public health institution in the world. They should have been leading the response from the beginning.
3/ Basic tenets of public health:
- "Know the Truth." This White House is about obfuscation & confabulation.
- "a coherent FEDERAL plan," not a patchwork response: podcasts.apple.com/us/podcast/epi…
- We need cooperation & coalition, not division. The virus is winning by divide & conquer.
Read 8 tweets
Céline Gounder, MD, ScM, FIDSA Profile picture
5 Oct 20
1/ Great speaking with @Elemental's @smithdag today.
elemental.medium.com/everything-we-…
Some highlights:
- “If the fever came down on its own, that’s a very good sign prognostically. If the fever required medication to come down […] it wouldn’t necessarily mean he’s getting better..."
2/ Steroids like dexamethasone and medications like aspirin, Tylenol, and ibuprofen will reduce a fever.
3/ On Fri/Sat, Trump had an oxygen saturation below 94%. Dr. Conley said it didn't got down to the low 80s. So that would imply it dropped to the upper 80s.
Read 12 tweets

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