Covid vaccines offer protection against disease, not infection: Experts

Gujarat minister Ishwarsinh Patel not too long ago examined optimistic for the novel coronavirus days after being administered the vaccine on March 13. Some nursing employees at a authorities hospital in East Delhi additionally examined optimistic for the virus a number of days after taking a second jab of the Covid-19 vaccine.

Similarly, a health care provider from a Solan-based regional hospital had examined optimistic for Covid an infection 27 days after he obtained the second dose of vaccination. The physician had taken the primary Covid vaccine jab on January 16 and the second on February 13.

Her samples had been despatched to a Mumbai-based lab to establish the reason for the an infection and to seek out out whether or not she was contaminated by any mutant pressure.

A last 12 months MBBS scholar from Mumbai’s Sion Hospital had additionally examined optimistic for Covid after receiving the vaccine. The 21-year-old scholar had developed signs of viral an infection and has been admitted to the Seven Hills Hospital.


Experts have acknowledged a number of explanation why individuals are testing optimistic after receiving the vaccine.

Not taking sufficient precaution after vaccination is one motive. Not sporting a masks and ignoring different security protocols is one more reason that has been linked to instances the place people have gotten contaminated after getting vaccinated.

Healthcare staff nonetheless stay extremely uncovered as they work in medical settings, which is why they’ve been made the precedence group to get vaccinated first internationally.


Experts stated the vaccine provides protection against the illness triggered by Covid-19, however not against the an infection itself.

“The vaccine’s efficacy is only in preventing death or serious illness. This protection is offered only 2-3 weeks after the second dose. The vaccines don’t protect against infection. Post-vaccination, people can get infected and transmit it to others. Therefore, people will have to continue wearing masks as they are at risk of spreading to others,” stated Dr Giridhar Babu, epidemiologist, PFHI.

“No vaccine is perfect, so not everyone vaccinated will be protected from disease. Testing positive could mean infection which is asymptomatic or illness. Vaccines are not expected to protect against asymptomatic infection (although they may) but do protect against disease. A 95 per cent efficacy still means that a small proportion of cases that occur will be in vaccinated people,” stated famend vaccine knowledgeable and professor of microbiology at Christian Medical College, Vellore, Dr Gagandeep Kang.


Experts say these are not re-infections, however they’re cases the place there was a “breakthrough in the barrier of immunity” created by the vaccine.

“One needs to look closely at the cases of breakthrough after vaccination to know if they are mild in nature or serious infections of Covid-19. If the disease travels from being a serious infection to a mild one, that is what is expected of the vaccine,” stated main virologist Dr T Jacob John.

“All vaccines protect against the disease and not the infection. The only one that does is the HPV Human papillomavirus vaccine.”


Experts say the general public who’ve been vaccinated could develop Covid-19 an infection, however they’re largely more likely to be asymptomatic.

“Even after one develops an infection, the chances of transmission would be that the viral load would be far less than someone spreading the infection who has not been vaccinated,” stated Dr John.

“Science states that no vaccine can ensure fully that the disease will not infect you. But with a vaccine if the disease infects a person, then it will not be as debilitating to cause death,” stated a well being ministry senior official.


Scientists stated that individuals might even get a 3rd vaccine dose to create extra immunity against the virus.

“A third dose could provide a much-needed booster dose to create a hyperimmune response. Each additional dose will boost immunity to a high level,” stated Dr John.

A 3rd dose of vaccines primarily based on inactivated or entire virus platforms — Covaxin by Bharat Biotech and mRNA (messenger RNA vaccines) reminiscent of Moderna — could be given to spice up immunity.

However, a 3rd dose of Oxford-AstraZeneca’s COVID-19 vaccine, which makes use of a chimpanzee Adenoviral vector, can’t be given. The identical applies to Sputnik V, which makes use of a weakened virus to ship small elements of a pathogen and stimulate an immune response.

“These cannot be given as a third dose as the immunity they will induce would be irrelevant after the second dose,” stated Dr John.


There is an pressing want to extend the tempo of vaccination in India. India is breaching the three million-mark in vaccinations each various day. In the final 24 hours, there have been 32,53,095 vaccinations a day. The total vaccine doses administered within the nation has reached practically 5 crores.

According to a DIU report, India must vaccinate 10 instances quicker than the present charge if it has to satisfy the federal government’s goal of 27 crore vaccinations — each first and second doses — by July 31, 2021.

Many specialists additionally counsel opening vaccinations for all age teams eligible for quicker vaccine distribution. On Tuesday, the federal government introduced that individuals above the age of 45 years shall be eligible for vaccination from April 1, 2021.

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