In Brazil, several cases of avian flu (禽流感) were found in wild birds. Seven cases were reported in Espirito Santo state. Another was discovered in Rio de Janeiro state. Brazil has announced a six-month animal health emergency. That makes it easier for the government to now take action to stop the dangerous H5N1 virus from spreading.
Brazil is the world’s largest country that sells chicken meat to other countries. It sells nearly $10bn of chicken meat a year. The government says the cases were found far away from Brazil’s main areas of production. However, the discovery of avian flu cases in wild birds may lead to spread in chickens and other animals. The finding of a case on a farm often causes the kill of a large number of birds. It can sometimes result in trade restrictions (限制) from other countries. The health emergency has been announced across the whole country for the next 180 days as a precaution.
The world has been going through its worst bird flu ever since October 2021, causing the deaths of more wild birds than ever before. But scientists remain unsure why this bird flu is proving so much worse than others. The World Health Organization (WHO) says the further spread of the H5N1 virus will have to be monitored (监测) closely to see whether it is changing into a form which can spread among humans.
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