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A biological hazard, or biohazard, is a biological substance that poses a threat (or is a hazard) to the health of living organisms, primarily humans.This could include a sample of a microorganism, virus or toxin that can adversely affect human health.
All parts of the Biohazard sign can be drawn with a compass and ruler. The basic outline of the symbol is a plain trefoil, which is three circles overlapping each other equally like in a triple venn diagram with the overlapping parts erased. Reason
The sign is commonly referred to as a radioactivity warning sign, but it is actually a warning sign of ionizing radiation. Ionizing radiation is a much broader category than radioactivity alone, as many non-radioactive sources also emit potentially dangerous levels of ionizing radiation.
A microbiologist working on the reconstructed virus of the 1918 Spanish Flu, using a fume hood for biocontainment. [1]Biosecurity refers to measures aimed at preventing the introduction or spread of harmful organisms (e.g. viruses, bacteria, plants, animals etc.) intentionally or unintentionally outside their native range or within new environments.
An example is zinc oxide, a common paint pigment, which is extremely toxic to aquatic life. [citation needed] Toxicity or other hazards do not imply an environmental hazard, because elimination by sunlight , water or organisms (biological elimination) neutralizes many reactive or poisonous substances. Persistence towards these elimination ...
A skull and crossbones is a symbol consisting of a human skull and two long bones crossed together under or behind the skull. [1] The design originated in the Late Middle Ages as a symbol of death and especially as a memento mori on tombstones.
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Another definition of risk is "the probable frequency and probable magnitude of future losses". This definition also focuses on the probability of future loss whereby the degree of vulnerability to hazard represents the level of risk on a particular population or environment. The threats posed by a hazard are: