Contact tracing is the process of identification of persons who may have come into contact with an infected person ("contacts"). By tracing the contacts of infected individuals, testing them for infection, treating the infected and tracing their contacts in turn, public health aims to reduce infections in the population. Diseases for which contact [...]
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Coronaviruses are a group of viruses that cause diseases in mammals and birds. In humans, coronaviruses cause respiratory tract infections that are typically mild, such as the common cold, though rarer forms such as SARS, MERS, and COVID-19 can be lethal. Symptoms vary in other species: in chickens, they cause an upper respiratory tract disease [...]
Music is a powerful means of communication. Music is an art form, and cultural activity, whose medium is sound. General definitions of music include common elements such as pitch, melody, harmony, rhythm, dynamics (loudness and softness), and the sonic qualities of timbre and texture. Music is performed with a vast range of instruments and vocal [...]Saint Ambrose (334-397), a keen advocate of church music is credited with introducing it into christian worship.