Herd Immunity

Delta variant sees global uptick, might have killed the idea of herd immunity in many countries

Herd immunity is achieved when a certain threshold of the global population has either been inoculated against a pathogen or has recovered from infection.

Why antibodies detected in a survey is not a guarantee of herd immunity against fresh infection

Compared to the uncertain strength and duration of immunity conferred by natural infection, the immunity conferred by the vaccine is stronger and will probably last longer

Herd immunity 'very difficult' to achieve amid mutant COVID-19 strains, says AIIMS Delhi chief

Speaking at the Jaipur LitFest, Randeep Guleria said that no sero-surveys conducted so far have suggested that India is anywhere near achieving herd immunity

The goal is herd immunity against COVID-19, when will we know if we have reached it?

Proof that we’re nearing herd immunity would be a “disruption in the chain of transmission.”

COVID-19 explainer: How will we know we've reached herd immunity? And how emergence of variants impacts it

It’s not known how long immunity lasts, either after vaccination or from an infection, though experts believe it should be at least several months

Over 19.5L COVID-19 vaccinations, 348 AEFIs so far; Delhi heading to 'herd immunity', suggests sero-survey

India recorded the lowest number of coronavirus fatalities in over eight months, with 131 deaths being reported on Monday, the health ministry said

Dummy's guide to how trade rules affects the access to COVID-19 vaccines

There is an urgent need to clarify public interest and public health exceptions to TRIPS intellectual property rights.

COVID-19 herd immunity unlikely in 2021 despite vaccine rollout in several nations: WHO

Scientists estimate that a vaccination rate of about 70% is needed for herd immunity, where entire populations are protected against an infection

Lagging behind in COVID-19 vaccine race, CureVac bets on a easier to store, mass produce jab

CureVac's product also requires a far lower dosage of just 12 micrograms, compared to 30 micrograms for BioNTech and 100 for Moderna, allowing for faster mass manufacturing.

India could vaccinate 800 mn people, develop herd immunity with its 1.6 bn COVID-19 vaccine doses

India purchased 500 mn doses of Oxford University-AstraZeneca vaccine, one bn from Novavax and 100 mn doses of the Russian Sputnik V candidate.