Covid-19 vaccines may prevent infection and not just symptoms, study suggests


Every human life is precious and sacred and saving one is like the saving of the whole of humanity. (Al Quran 5:32/33)

By Madeline Holcombe, CNN

(CNN) Health experts have said that data so far has shown that Covid-19 vaccines prevent symptoms of the virus — but a new study suggests that the Moderna and Pfizer vaccines may also prevent infections.

A team at the Mayo Clinic health system looked at more than 31,000 people across four states who had received at least one dose of either vaccine — and found their vaccines were upwards of 80% effective in preventing infection 36 days after the first dose.

Vaccine efficacy was 75% 15 days after the first dose, and appeared 89% effective from 36 days after the second dose, according to the research, which has not yet been peer-reviewed.

Despite a backlog in inoculations due to harsh winter weather that has gripped much of the US, officials have been pressing to vaccinate Americans before what appear to be more transmissible variants, which they fear could reverse the progress in terms of lowering cases and hospitalizations.

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Categories: Vaccine

2 replies

  1. ADDIS ABABA, Ethiopia—A cavernous new airport cargo terminal in Ethiopia’s capital is the center of a vast supply network China is assembling to speed delivery of its coronavirus vaccines—and deepen its influence across the developing world.

    At one end is a soccer-field-sized freezer to store vials from Chinese state-controlled drug companies. At the other is a control room with a wall of computer monitors where Chinese and Ethiopian technicians will track temperatures of every batch.

    This week, more than one million doses of China’s new Covid-19 inoculations will move through here, according to Ethiopian Airlines officials. Thousands of doses have already passed through, they and Ugandan officials said. More deliveries are set to arrive via a partnership between Chinese technology giant Alibaba Group Holding Ltd. and Ethiopian Airlines, said officials at the state-owned airline.

    At stake is a potential soft-power prize: the goodwill of politicians and people across the developing world needing low-cost Covid vaccines, and the prestige of being seen as a nation with the capacity to act as a guardian of global public health.

    For months, China’s government, state enterprises and private companies have laid the groundwork for a vaccination push from Africa to the Middle East and Latin America. They’ve assembled a supply chain that would maintain temperature controls from the point of manufacturing through every step of distribution—and further the “Health Silk Road,” as Beijing has called it.

  2. The U.S. vaccine supply for next month just got bigger.

    On Tuesday, Johnson & Johnson said it will be ready next month to ship 20 million doses of its one-shot vaccine. That adds to a coming surge in vaccine availability, according to a Bloomberg analysis of drugmaker promises.

    Along with vaccines from Pfizer Inc. and Moderna Inc., which both require two doses, the delivery targets through next month will be enough to fully vaccinate 130 million Americans.

    Bloomberg’s analysis is based on company statements, data on the number of shots already delivered and conversations with people familiar with the efforts who spoke on condition of anonymity. The analysis assumes J&J’s shot, which hasn’t been approved yet, is cleared for use and that drugmakers meet their new delivery targets — not a guarantee.

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