Vaccination is the way out of this pandemic. Five facts about Covid vaccines:
The risks of infection are vastly higher than the risks of vaccination. Even healthy young people can become severely ill, die, or suffer long-term harm from Covid infection.
Covid vaccines prime your immune system to fight the virus, then disappear. They don't stay in your body.
The overwhelming majority of doctors offered a Covid vaccine have gotten it as soon as they could.
The more people vaccinated, the faster we’ll get back our jobs and economy.
Vaccinations have already saved least 40,000 lives in the US—and can save at least 100,000 more in the coming months. Get vaccinated when it's your turn!

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More from @DrTomFrieden

2 Oct
Pfizer and Moderna deserve credit for responding quickly to the most disruptive health crisis in a century and producing great vaccines. But failure to transfer technology will tarnish their reputations, prolong the pandemic, and could result in millions of deaths. 1/thread
mRNA vaccines are extremely safe, remarkably effective, & have saved hundreds of thousands of lives. They are our most powerful tool to end the pandemic. They’re easier to tweak for variants, quicker to produce, and less likely to suffer production problems than other vaccines.2/
mRNA vaccines appear to be even safer than other vaccines - which are very safe - and even more effective. mRNA vaccine production is our insurance policy against new, dangerous variants and against production delays with other vaccines. 3/
Read 27 tweets
18 Sep
Herd immunity to Covid? Maybe an impossible dream. We need to reframe our approach to the pandemic and learn more, and limit the death and disruption. Here’s how. 1/thread
No one knows what will happen next in the pandemic. Longer-term predictions are just guesses. But we do know the endgame has shifted. Eradication is not possible. Even control will be difficult. We can reduce transmission and severe disease, but we can’t eliminate them. 2/
Today an FDA committee voted to recommend booster doses of Covid vaccines for people ages 65 and older and those at high risk of severe disease. Unlike Israel, they decided there is currently insufficient evidence of the need or benefit for everyone to get boosters. 3/
Read 25 tweets
3 Sep
Delta’s sharp rise in the UK and Israel presaged the large wave we’re facing in the US. But in key ways, our epidemic curve looks different. I’ll explain how it’s different, why, and what this tells us about the future of the pandemic. 1/thread
In the US, we haven’t tested at nearly the rate of the UK and Israel. We test at less than one third their rate of testing. Because of this, we have likely missed A LOT more cases. 2/
This may explain why our curve doesn’t go quite as high as Israel’s or the UK’s. The number of actual infections is likely much higher (at least 3X, maybe more than 5X) than the number of reported cases in the US. 3/
Read 12 tweets
14 Aug
CDC recommended today that some people with weakened immune systems get a third dose of mRNA vaccine as part of their primary series to achieve better protection from Covid. This recommendation makes sense. 1/thread
About 2.7% of US adults—roughly 7 million people—are immunocompromised, which means they have a condition that may interfere with how their body responds to infections as well as to vaccines. Here are CDC’s new recommendations: 2/
Evidence shows that people with these conditions are at higher risk of severe illness and death from Covid, can shed virus longer and transmit it more to household contacts if they get infected, and are less protected by vaccines. 3/
Read 18 tweets
11 Aug
If the Covid surge in the US follows the pattern of the UK and India, we’ll see cases top 200,000 in the coming weeks—but we may also see a sharp and sudden decrease soon after.

Why do explosive surges caused by Delta seem to burn out so quickly? A theory...

1/thread Image
No one knows for sure why cases have plunged so precipitously in countries where the Delta variant has become dominant. But understanding this trend could help us gain control of the pandemic. 2/
There’s been a lot of focus on one epidemiological term: the basic reproductive number, or “Ro,” which is the average number of people infected by one case without vaccination or control measures. Delta is at least two times as infectious as other strains, with an Ro of 5-6. 3/
Read 23 tweets
31 Jul
Perspective: Here's the most revealing set of graphs I've seen in a long time. The UK's latest surge started about 33 days before the surge here in the US. 1/thread of 5
If the US case trend follows that of the UK, we'll have more than 200,000 cases a day by early September, possibly many more. See how the lines on the right are almost perfectly parallel. 2/5
What was somewhat reassuring is the relatively modest increase in the UK hospitalization rate. This suggests that because of the UK's very high rate of vaccination of seniors, the proportion of infections that are life-threatening is much lower. 3/5
Read 5 tweets

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