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AstraZeneca vaccine drops 3 percentage points in effectiveness rate

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The makers of the Covid-19 AstraZeneca vaccine have dropped its effectiveness rate by 3 percent. The revised rate comes after an independent panel of experts appointed to supervise the trial expressed concern that AstraZeneca had failed to include updated data in its initially released figure. The US National Institutes of Health then issued a rare statement asking AstraZeneca to work with the panel to issue a new press release.

Now, the British-Swedish company says the vaccine is 76% effective at preventing any kind of symptomatic Covid, falling from the 79% that was reported in previous trials. It says it remains 100% effective against severe forms of the Covid virus.

The new figure is based on 190 people who fell sick among 32,449 trial participants across the United States, Peru and Chile, 2/3 of whom received the vaccine while the rest received a placebo. The previous figure was based on 141 cases, with the company adding that there are 14 more probable cases of Covid that are waiting to be adjudicated in the new figures, which could affect the rate positively or negatively by a few percentage points.

AstraZeneca was an early frontrunner in the global race to develop a Covid vaccine, with the United States ordering 300 million doses. But the US became less confident after several communication errors, resulting in the authorisation of other vaccines by Pfizer, Johnson & Johnson, and Moderna.

Recently, several European countries, as well as Thailand, halted the rollout of the vaccine over potential blood clot risks before later resuming its use. The European Medicines Agency responded to the concerns by deeming the vaccine safe and said it was not associated with blood clotting generally, but noted that it could not rule out a link to 2 highly rare forms of clotting. The agency then suggested that a warning label should be put on the vaccine packaging.

Meanwhile, the southern resort islands of Phuket and Koh Samui have made requests to the Public Health Ministry for enough doses of the AstraZeneca vaccine to inoculate a majority of the islands’ residents in anticipation of an early return to some semblance of tourism. Both holiday islands have a high reliance on tourist dollars. Private businesses in Phuket have made a formal request for 900,000 doses of the AstraZeneca vaccine to the Public Health Minister.

SOURCE: Bangkok Post

 

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11 Comments

11 Comments

  1. Avatar

    Ian Bromley

    Thursday, March 25, 2021 at 2:18 pm

    This country has tied it’s future to this incompetent company. There can be no confidence in the Thai manufacturing plans actually happening, which will plunge this country into chaos and further damage to the already seriously threatened tourism industry. It is sickening to watch the antics of Anutin posing for press coverage as he gets vaccinated. I wonder how the general population will feel when he fails to deliver!

  2. Avatar

    Bobby m

    Thursday, March 25, 2021 at 2:37 pm

    Unbelievable. Now it’s about a +/- off 3%.

    AZ is the most economical vaccine that works well enough to stop serious illness and offers in excess of 70% protection against Covid and100% protection against serious illness and hospitalisation.

    The company has pledged to provide the vaccine to developing countries at cost (non profit making). This in turn limits the sales of other manufacturers vaccine. Sad that it may be. It’s my opinion, that this bombardment of continual attempts to discredit the vaccine is commercial. Profit over lives, appalling.

  3. Avatar

    Issan John

    Thursday, March 25, 2021 at 4:42 pm

    So “76%” effective?

    Not 97 or 98%”

    So from the point of view of transmission and being contagious, 24% of those coming in vaccinated and so avoiding quarantine may as well not be vaccinated at all?

    So if just a tenth of 2019 figures arrive, 2,500 every day will be no less contagious than if they hadn’t been vaccinated at all?

  4. Avatar

    quang

    Thursday, March 25, 2021 at 4:52 pm

    https://www.lci.fr/international/covid-19-coronavirus-pandemie-italie-ce-stock-de-29-millions-de-doses-de-vaccin-astrazeneca-qui-interpelle-bruxelles-2181622.html

    If everybody can translate and read this…
    Thai governement have to get all and more informations before vaccin the population.

  5. Avatar

    Issan John

    Thursday, March 25, 2021 at 6:28 pm

    “The company has pledged to provide the vaccine to developing countries at cost (non profit making)”

    Only for the “duration” of the pandemic, as they see it, Bobby M.

    ALL current manufacturers have done the same.

  6. Avatar

    toby andrews

    Thursday, March 25, 2021 at 10:34 pm

    Yes well I John the Thais will not be producing it will they? You wrote that they would.
    Why, I will give one two guesses.
    They will either produce it as saline water, and sell the real serum to private hospitals, for big profits, or they will cock the whole production up because they cannot manufacture a vaccine even if they be have a 100 ferangs in the factory showing them how.
    Why Is Britain giving the vaccines after the way they have treated our nations over the last 12 months?
    Thailand is a pariah state!

  7. Avatar

    James R

    Friday, March 26, 2021 at 1:49 am

    Hold you breath Thailand yet again as you will not be receiving anything soon, you ordered your vaccines far too late.

    India has banned the export of the drug as they need it for their own use now so no supplies from them into Thailand.

    I see Issan John is knocking his own country again as usual (the UK), whatever the company is doing it is at least doing something right, not like the useless country you now try and call you own even though you are just a farang visitor.

    I seem to come across a lot of farangs in Thailand who hate where they come from.

    But Thailand is still a good country for holidays as long as I avoid the long term miserable farangs crying into their beer.

  8. Avatar

    James R

    Friday, March 26, 2021 at 3:40 am

    toby

    But it is still a great place for long holidays.

    As Dire Straits sang, “money for nothing and the chicks for free’, except of course they are not free in Thailand but are pretty cheap.?

  9. Avatar

    Big Al

    Friday, March 26, 2021 at 3:41 am

    Well Said. Thats Made my day

  10. Avatar

    Issan John

    Friday, March 26, 2021 at 12:37 pm

    “Why Is Britain giving the vaccines after the way they have treated our nations over the last 12 months?”

    Britain’s not, Toby A.

  11. Avatar

    LondonAl

    Friday, March 26, 2021 at 7:42 pm

    Issan John logic, “if just a tenth of 2019 figures arrive, 2,500 every day will be no less contagious than if they hadn’t been vaccinated at all”

    As ever manipulating numbers to suit his negative narrative, even if he’s right what percentage of 2,500 will be carrying Covid and won’t that be picked up by testing, or is John then going to harp on about false tests?

    Work this out John, I have had 2 shots of AZ vaccine, I come from an area where there are 48 cases per 100,000, I have tested negative before I leave and tested negative when I arrive, what are the odds of me carrying Covid? I’ll tell you, it runs into millions to one.

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Ann Carter is an award-winning journalist from the United States with over 12 years experience in print and broadcast news. Her work has been featured in America, China and Thailand as she has worked internationally at major news stations as a writer and producer. Carter graduated from the Walter Williams Missouri School of Journalism in the USA.

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