New Delhi: Millions of people have been killed worldwide so far due to the global epidemic. The economies of the world have been damaged. In India, where the decline in daily cases of covid and the increase in recovery rate is a good subject, the threat to the recovered people has not yet ended. Doctors believe that those who have been recovered from the coronavirus and high pollution may be in distress for them. Doctors have said that the recoverable people living in air pollution cities are becoming required to take flu vaccine. Air pollution is increasing the risk of corona patients' sensitivity, hospitalization and death. Doctors believe that air pollution can increase the symptoms of ' long covid ' (long-term corona symptoms), which can prove to be dangerous for recovered patients. It is learnt that 143 patients were cured by corona in a Rome hospital, but 87 per cent of them began to see at least one symptom of covid after two months. The patients complained of cough, fatigue, diarrhea, joint pain, etc. According to the information found, older people, women, overweight and obese people, asthma patients, if the symptoms of covid are found in the initial five weeks, they have a high crisis of long covid. People who have mild symptoms of corona or without symptoms can also become a threat. Dr. Randeep Guleria, director, Junha AIIMS said, "The festival season has come. The temperature will decline and the pollution level increases. There will also be crowds of people in the markets, so people with long covid should take flu vaccine. " Also Read: Tata Motors eyes partner for CV biz TV actor Preetika Chauhan arrested in drugs case Southern Railways introduce special trains ahead of Diwali Kerala's active cases nearing one lakh mark; Toll mounts to 1,281