An unidentified sickness that struck southeastern India has left in excess of 300 individuals hospitalized and medical experts perplexed. Health authorities examining the disease said that at least one individual has died, while the rest are all in “stable” condition.

Individuals infected with the unidentified disease were generally from the city of Eluru in the province of Andhra Pradesh. Health authorities said that patients showed symptoms of nausea, loss of consciousness, and seizures.

The province of Andhra Pradesh is one of the most affected areas of the Covid pandemic in India, with in excess of 800,000 positive cases. However, authorities exploring the most recent sickness said that none of the patients had tested positive for Covid-19.