People wear protective face coverings in Connaught Place, New Delhi, India.

An unidentified illness has led to hundreds of hospitalisations and at least one death in southern India, according to reports from various outlets.

This mysterious illness was found in Eluru in the state of Andhra Pradesh pm Saturday, according to The Associated Press.

A district surveillance officer said that over 450 people have been hospitalized with this illness that has yet to be identified, The Guardian reported Monday. 

According to a district collector's report, people with the illness said they experienced "3 to 5 minutes of epileptic fits without repetition, forgetfulness, anxiety, vomiting, headache, and back pain," and most of those infected were between the age of 20 and 30, The Times of India reported Monday.

One 45-year-old man has died with symptoms associated with this illness, including nausea, various reports including The Associated Press and The Guardian.

A district surveillance officer said that "all patients have tested negative for Covid-19," and that the cause remained unknown as of today, according to CNN.

India has been severely struck by the coronavirus. As of Monday, India has the second-largest number of coronavirus cases in the world, surpassing 9 million, according to Johns Hopkins University. The US has the highest number of coronavirus cases of over 14 million, according to Johns Hopkins University.

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