Diseases, Conditions, Syndromes

Medical historian calls COVID-19 response a 'failure of expertise'

A leading medical historian from City's Department of Journalism has contributed an article on the scientific and political failures in the UK's response to COVID-19 to the Royal Society's Interface Focus journal.

Medical economics

Sharing vaccines is in countries' best interests

How nations can best allocate COVID-19 vaccines remains a discussion of global importance. And at its heart is the question of whether countries with greater access to vaccines should focus on vaccinating their own citizens ...


Kids need the COVID-19 jab for herd immunity

James Cook University scientists have developed a new model to track the COVID pandemic—and it's telling them Australia should now prioritize delivering the Pfizer vaccine to 12-40 year-olds.

Diseases, Conditions, Syndromes

Has Delta killed the herd immunity dream?

As the Delta variant continues its global surge, experts are questioning whether the long-held goal of achieving herd immunity from COVID-19 through vaccination is still viable.

Diseases, Conditions, Syndromes

How the Delta variant is changing the U.S. forecast for COVID-19

(HealthDay)—COVID-19 vaccines are helping protect the unvaccinated as the new Delta strain surges across the United States, but experts say its high infectiousness could mean even more people need to take the jab to achieve ...

Diseases, Conditions, Syndromes

COVID-19 herd immunity is not going to happen, so what next?

Any notion that COVID-19 was going to last for just a few months was very much misplaced in 2020. Especially after it was recognized that the SARS-CoV-2 virus was largely spread through the airborne route, all indications ...

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Herd refers to a social grouping of certain animals of the same species, either wild or domestic, and also to the form of collective animal behavior associated with this (referred to as herding) or as a verb, to herd, to its control by another species such as humans or dogs.

The term herd is generally applied to mammals, and most particularly to the grazing ungulates that classically display this behaviour. Different terms are used for similar groupings in other species; in the case of birds, for example, the word is flocking, but flock may also be used, in certain instances, for mammals, particularly sheep or goats. A group of quail is often referred to as a covey. Large groups of carnivores are usually called packs, and in nature a herd is classically subject to predation from pack hunters.

Special collective nouns may be used for particular taxa (for example a flock of geese, if not in flight, is sometimes called a gaggle) but for theoretical discussions of behavioural ecology, the generic term herd can be used for all such kinds of assemblage.[citation needed]

The word herd, as a noun, can also refer to one who controls, possesses and has care for such groups of animals when they are domesticated. Examples of herds in this sense include shepherds (who tend to sheep), goatherds (who tend to goats), cowherds (who tend cattle), and others.

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