Kerala logged 2,475 fresh COVID-19 cases on Wednesday taking the infection count to 10,83,879, even as the toll went upto 4,342 with 14 more fatalities,the state government said.
While 4,192 people recovered from the disease today, 35,418 people were presently undergoing treatment for the infection and 10,43,473 have been cured, Health minister K K Shailaja, said in a press release.
In the last 24 hours ending 2 pm today, 62,486 samples were tested and the test positivity rate touched 3.96 percent.
A total of 1,20,60,313 samples have been sent for testing so far, according to the release.
Of the positive cases, 12 were health workers, 75 had come from outside the state and 2,235 were infected through contact.
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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.
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.
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.
As many as 1,62,766 people were presently under observation in various districts,including 5,118 in hospitals, the release said.
While Kozhikode accounted for 341 cases today, Malappuram reported 283, Ernakulam 244, Pathnamthitta 233 and Kollam 201. Six districts reportedover 100 cases.Follow our full coverage of the coronavirus pandemic here.