HomeNewscoronavirusPharma wrap: Festivals, winter perfect setting for Covid surge, can't afford to let the guard down

Pharma wrap: Festivals, winter perfect setting for Covid surge, can't afford to let the guard down

With a vaccine at least three months away, it becomes important for governments to manage the infection rates but it won't be easy.

October 04, 2020 / 10:42 IST
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India’s death toll from Covid-19 has crossed 1 lakh, another grim milestone, with the country reporting 64,73,544 coronavirus cases, so far.

India’s caseload is second only to the United States and for several days, it has been reporting the highest daily infections for any country in the world. There are signs that the infections could be slowing down but it is too early to celebrate.

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It is the days ahead that have the Centre and states worried as the fifth phase of rolling back of restrictions runs into the festival season that also marks the onset of winter, when a possible surge in infections can’t be ruled out.

SARS-CoV-2 is a new virus and it is not known how it will behave in winter but other coronaviruses are known to spread more easily in the season as cold and dry conditions allow them to survive longer in the air.

COVID-19 Vaccine
Frequently Asked Questions

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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.

How many types of vaccines are there?

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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