Grifols, through pioneering plasma research, looks to reveal early warning signs of Parkinson's

A plasma donation center in Lewiston will close next week as part of a broader effort by a global healthcare company to streamline operations. The Grifols Biomat Plasma Center at 239 Main St. is ...

Spanish drugmaker Grifols SA paid a higher price to buy blood plasma from an entity linked to its controlling family than from third-party suppliers, according to a regulator’s findings submitted in a ...

MSN: Health Canada slaps new conditions on plasma donation company Grifols, still reviewing 2 Winnipeg deaths

Health Canada slaps new conditions on plasma donation company Grifols, still reviewing 2 Winnipeg deaths

Happen means ‘occur’ and most commonly ‘occur by chance’: … In English, many past and present participles of verbs can be used as adjectives. Some of these examples may show the adjective use. Yet, as stated above, its discovery happened at a time when it was still not visible.

This brings us to a common confusion between “happend” and “happened.” Let’s sort this out. The correct form is “happened”. “Happend” is a common misspelling and is not recognized in English grammar. Happened” is the past tense of the verb “happen,” which means to occur or take place.

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Correct spelling, explanation: happened is the correct form, because contrary to such words as planned or beginning, the n in happened is not a part of the stressed syllable.