Betacoronavirus the Latin “corona” meaning crown or halo, referring to their image under electron microscopy of crown-like spikes on their surface similar to the solar corona. This morphology is created by the viral spike (S) peplomers, which are proteins that populate the surface of the virus and determine host tropism. The order Nidovirales is named for the Latin nidus, which means nest. It refers to this order’s production of a 3' co-terminal nested set of subgenomic mRNA's during infection. Betacoronavirus Betacoronaviruses are one of four genera of coronaviruses of the subfamily "Coronavirinae" in the family "Coronaviridae", of the order "Nidovirales". They
Latin word order a sentence, therefore. Other words, such as "fere" "approximately" and "etiam", are frequently enclitic: In the phrase "ne ... quidem" "not even", the word "quidem" generally follows the first word of the emphasised phrase, rather than the whole phrase: Personal pronouns such as "me" "me" and "mihi" "to me" can have weak and strong forms in Latin. When weak they tend to be found early in the sentence, either after the first word (which can be a conjunction such as "cum" "when" or "et" "and") or after an enclitic such as "enim", if present: Contrast sentences like the following, where