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6 security personnel among 9 new COVID-19 patients in Mizoram

Four fresh infections were detected in Lunglei district, two each in Aizawl and Serchhip and one in Hnahthial, he said.

December 30, 2020 / 09:14 AM IST
Security personnel stands guard during an encounter with militants at Pantha Chowk area, on the outskirts of Srinagar

Security personnel stands guard during an encounter with militants at Pantha Chowk area, on the outskirts of Srinagar

Mizoram's COVID-19 tally rose to 4,199 on Wednesday as nine more people, including six security personnel, tested positive for the infection, a health official said.

Four fresh infections were detected in Lunglei district, two each in Aizawl and Serchhip and one in Hnahthial, he said.

Five Border Security Force (BSF) personnel and one Assam Rifles jawan are among the new patients, the official said.

Eight patients have travel history and one infection was detected during contact tracing, he said.

Mizoram now has 103 active coronavirus cases, while 4,088 people have recovered and eight patients have succumbed to the disease so far, the official said.

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How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

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There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.

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The state has so far tested 1.78 lakh samples for COVID-19, including 1,159 in the last 24 hours.
PTI
first published: Dec 30, 2020 09:15 am

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