Havana syndrome, a secret weapon or an unknown illness

Context

As per a recent update, two separate cases of unexplained health incidents were reported by US personnel in Vietnam.

What is Havana syndrome?

• These "unexplained health ailments" have been reported by Americans serving in other countries, including Germany, Austria, Russia and China.
• Symptoms: A person suffering from Havana syndrome exhibits a range of symptoms. These include nausea, hearing loss, memory loss, dizziness and tinnitus.
• After-effects: Some after-effects of the syndrome also include headaches, tinnitus, ear pain, vertigo, brain fog, loss of balance, muscle control and loss of vision and hearing.

How was it discovered?

• Havana syndrome was first detected in 2016 among spies and diplomats working at the American embassy in Havana.
• The syndrome still manages to remain a mystery for the world even after five years.