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What is seroprevalence?

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Covid test vial  Photo by  Vincent Ghilione  on  Unsplash Seroprevalence is the level of a pathogen (e.g. the virus Covid-19) found in a particular population - a country, city or region for example. This is measured by administering blood test to as wide a sample of that population as is feasible. Testing The accuracy of seroprevalence is dependent on a number of factors including the size of the sample tested as a proportion of the general population Photo by  Colin D  on  Unsplash the representative nature of that population in terms of age, sex, socio-economic conditions, ethnicity, size of household, number of social interactions, occupation etc. the accuracy of the tests, especially if these are physically difficult to administer. Covid-19 tests are quite physically intrusive as they require a throat swab. the accurate record keeping of the testers the potential for cross-contamination the estimated number of false positives and false negatives. Medical

Where does 'catch a cold' come from?

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Lest the bargain should catch cold and starve. (Iachimo, Act 1 Scene 4)   Shakespeare introduces the phrase 'to catch cold' in Cymbeline (1610). This was his 'comeback'  play after theatres had been 'dark' (closed) for a long period due to a plague epidemic in London.  'Catch cold' is a euphemism here. Iachimo is thinking of something more serious than a blocked nose and a sore throat. The Common Cold: Vocabulary Worksheet

Where does the word baseball come from?

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The earliest reference to baseball comes in a diary entry of a Surrey solicitor, William Bray.

What is Bloomsday?

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On June 16, 1904 James Joyce met his future wife, Nora. He later memorialised the date as Bloomsday - the day of  Leopold Bloom 's  twenty-four hour mock-odyssey around Dublin in Ulysses (1922).  Ulysses  is renowned for the daunting challenge it poses readers ( see here for a brief beginner's guide). It also weighs in at at close to a thousand pages in the paperback edition.  What happens on Bloomsday? Joyce - whose self-importance  matched his monumental talent - believed Ulysses would provide scholars with 'a lifetime' of material. Doubtless, he would think it fitting that thousands now attend public readings of his work - most famously in Dublin where Bloomsday is a major tourist event.   What happens in Ulysses? English Language Teaching Pack   -  only £1.99

What is the 'language instinct'?

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In the early 1960s the linguist and cognitive scientist Noam Chomsky developed a theory which became known as universal grammar. The posited that we are born with the innate capacity to master a language.

Why did English become the 'global language'?

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English is the world's leading lingua franca or second language (see L2 speakers in the table below). According to David Crystal, this has nothing to do with its inherent qualities. Other linguists disagree: Read More  Download English Language FAQ Teaching Pack only £1.99