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Protection from hospitalization for Omicron variants can drop to 57% from 81% after 6 months from second dose, and can be pushed back up to 90% using booster shots for Pfizer and Moderna vaccines, according to a large CDC study in the US. For Delta variant period last year the vaccine effectiveness against hospitalization was 90% from about two weeks after dose two till 6 months, dropping to 81% after 6 months, and up to 94% after a booster shot. For Omicron variant the currently vaccine effectiveness for same periods is 81%, 57%, and 90%.

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Pfizer says a third dose of Pfizer vaccine neutralized the Omicron variant in lab tests. The two dose was much less effective at blocking the virus. A third dose increased antibodies 25 fold compared two doses for the omicron variant. Pfizer CEO Albert Bourla says- "Although two doses of the vaccine may still offer protection against severe disease caused by Omicron strain, it's clear from these preliminary data that protection is improved with a third dose of our vaccine."

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The third or booster dose of vaccine is needed to take out the Omicron variant. The UK Health Security Agency analyzed data from 581 Omicron cases and thousands of Delta cases to calculate how effective vaccines such as Pfizer and Astra Zeneca were against the Omicron variant. This early analysis shows a third booster dose prevents around 75% of people from getting any coronavirus symptoms. The double dose of the vaccine however provides good protection against severe coronavirus that needed hospital treatment says the UK Health Security Agency. Of equal concern is the rate of spread of the Omicron variant. Here this BBC report shows graphs of UK National Health Security Agency which show the rate of spread is rapid with cases doubling every 2-3 days. For the UK which on December 10 had about 1265 cases this means says this BBC report that the number of Omicron cases could be well above 100,000 in the UK by the end of December. The BBC graph shows the curve for Omicron cases moving in a close to vertical direction upwards. Reports say the experience in South Africa where the Omicron variant was first detected is similar in pattern causing rapid spread. ...

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A 1 month study of 2 modified Pfizer vaccines, one targeted specifically for new Omicron variants, and the other targeted at earlier coronavirus and current Omicron variants show increases in anitbodies much higher than what current vaccines do. For Omicron specifically at 13 to 19 times more than what current vaccines increase antibodies, and for earlier variants and Omicron at 9 to 11 times more.

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What would making a new vaccine for the Omicron South African variant look like? How long will it take and how does it happen? Adam Whipple, Science Editor of The Times, looks at the process in the 100 days it would take Pfizer to do this in this excellent article that anticipates and answers readers questions. New mutations are shown to be taking place in the virus, it is shown here that UK and world capabilities have also increased to tackle the problem in the last 18 months.

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Dr. Ezekiel Emmanuel of the University of Pennsylvania gives this early warning on the risks of the sudden U turn in China's zero covid policy to complete reopening. He says the switch from zero covid to population wide immunity via viral spread is coming on too suddenly without preparation. He says China made three mistakes. First, the economic cost of zero covid that dropped growth and created high youth unemployment of over 20%. Second, not procuring Pfizer and Moderna mRNA vaccines with newer technologies. Third, moving to abruptly end the zero covid policy 180 degrees in a sudden move that lacks preparation. Precipitiously ending the zero covid policy for 800 million people means rapid spread says Dr. Emmanuel. He says the key variable the R statistic that measures how many people get infected from one covid patient on average, has moved from 2 to 3 during the early stages of the pandemic to 10 with the omicron variant. Chinese officials report the R to be at 16 in China today, says Dr. Emmanuel. ...

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In a factory the size of 5 football fields located in Gurnee, Illinois, Abbott Labs makes its BinaxNow Covid-19 home tests. Abbott turned out 1 billion tests in 2021 and at one point had 80% of the market. Along with Pfizer vaccine, BinaxNow Home covid-19 tests are a dominant product during the pandemic. Abbott generated a fifth of its $43 billion in revenue from these home tests. Abbott faced several hurdles along the way. It gained when the US government authorized it to make the test. Yet after vaccination took off by mid 2021 the demand for tests declined and Abbott nearly idled its giant factory in Gurnee. Delta and Omicron variants led to a sudden reversal and surge in demand. Abbott developed its test based on an existing design it used in the US for flu tests, by a company it inherited by acquisition called Binax. To do that test one sends a swab up the nose, add that sample and a liquid mixture to a rectangular paper card, and close the card shut. The liquid then travels up the paper strip, revealing one or two pink lines, one for negative, two for positive. This is done in 15 minutes and the simple design described as a lollipop shape, put Abbott far ahead of competitors. The US FDA authorized Becton Dickinson and Quidel to make the tests before it authorized Abbott, but these rival companies had a poor and complex design. The Trump administration gave Abbott a $760 million contract to buy 150 million tests for distribution to health departments, long termcare facilities, nursing homes, and schools. And by October 2020 Abbott was already making 50 million tests a month. When it comes to distribution Abbott tapped into its pharmacy connections for baby products such as Similac baby formula. This gave it an advantage over Quidel and others who also lacked the manufacturing knowhow for large scale ramp up. The BinaxNow in pharmacies was sold at $24 for a box of two tests, while government paid $5 for one test. Abbott says it makes $ 7 per single consumer test. Yet there was one problem waiting to hit Abbott in 2021- demand dried up as the vaccination campaign took off. In fact the plant manager, Mr. Rodriguez, planned to move to another job inside Abbott as production declined. Then came the Delta variant and he was asked to ramp up production again. With Omicron demand soared. The Biden administration committed $3 billion to help boost test production and asked Kroger and Walmart to sell over the counter tests at cost for 3 months. Abbott had to lure workers from Amazon at $25 an hour for the Gurnee plant expansion. What was learned by the government and Abbott from this experience? The US government now looks for ideas in meeting demand volatility, supply challenges and production needs,. Sustaining production capacity is important for future virus flareups- a new government-industry partnership is required for maintaining test making infrastructure. With government help Abbott plans now to keep the facility at Gurnee operating indefinitely. ...