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New Delhi, May 1: The Centre has finalsed the criteria for delimitation of various zones after May 3. It has identified at least 130 districts as red zones, 284 orange zones and 319 green zones.

According to a letter written by Health Secretary Preeti Sudan to the Chief Secretaries of all States and UTs, all the states have to delineate the containment areas and buffer zones in the identified red and orange zone districts and notify the same.

The letter said, the national capital has at least 11 red zones, Uttar Pradesh 19 red zones, 36 orange zones and 20 green zones while, the state of Haryana has 2 red zones, 18 orange zones and 2 green zones.

The Gautam Buddha Nagar in Uttar Pradesh has been identified as a red zone district while, Ghaziabad has been designated as an orange zone. The national capital has no orange and green zone; there are only red zones according to the letter.

In Maharashtra, Mumbai, Pune, Thane, Nashik come in the red zone.

In West Bengal, Kolkata, Howrah, 24 Parganas -- both North and South have been identified as red zones while Hooghly, Nadia, Murshidabad etc have been marked as orange zones.

In the southern part of India, Kerala has 2 red zones and 10 orange zones, while Tamil Nadu has 12 red zones and 24 orange zones.

The Health Secretary said that the list will be revised on a weekly basis or earlier and communicated to states for further follow-up action in consonance with the directions issued by the Ministry of Home Affairs under the Disaster Management Act, 2005 based on field feedback and additional analysis at state level, states may designate additional red or orange zones as appropriate.

However, states may not relax the zonal classification of districts classified as red or orange as communicated by the Ministry. This classification is multi-factorial and takes into consideration incidence of cases, doubling rate, extent of testing and surveillance feedback to classify the districts.

A district will be considered under green zone, if there are no confirmed cases so far or there is no reported case since the last 21 days in the district.

May 29: A total of 367 domestic flights, carrying 30,136 passengers, operated throughout the country till 5 pm on Thursday, Civil Aviation Minister Hardeep Singh Puri said.

Airports in West Bengal also started operations on Thursday, three days after domestic air travel resumed in India after a gap of two months.

All scheduled domestic passenger services were suspended in India from March 25 to May 24 due to restrictions in the wake of the coronavirus pandemic.

Earlier in the day, Puri had said that 460 domestic flights carrying 34,336 passengers were operated on Wednesday.

In the case of West Bengal, the minister on Sunday had said that the state will handle domestic flights from Thursday.

"Figures for domestic flights for 28th May 2020 are in. Departures 367, 30,136 passengers handled. Arrivals 310, 25,530 passengers handled. Total movements 677 with 55,666 passenger footfalls at airports.

 “Total number of flyers 30,136. These are numbers till 1700 hrs for Day 4," Puri said in a tweet.

A total of 428 domestic flights carrying 30,550 passengers and 445 domestic services carrying 62,641 flyers were operated in the country on Monday and Tuesday, respectively.

In February this year, when the lockdown was not imposed, around 4.12 lakh passengers travelled daily through domestic flights in India, according to Directorate General of Civil Aviation (DGCA) data.

During the pre-lockdown period, Indian airports handled around 3,000 daily domestic flights, aviation industry sources said. A total of 16 asymptomatic passengers on seven different flights including 13 of them who travelled by IndiGo have tested positive for COVID-19 since the resumption of domestic air services on Monday, according to airlines data.

Two of the three asymptomatic passengers who tested positive for the infection had travelled by Spicejet while one took a flight of Air India subsidiary Alliance Air.

The Karnataka government, meanwhile, said on Thursday it has requested the civil aviation ministry to reduce the number of flights originating from five states--Maharashtra, Gujarat, Tamil Nadu, Madhya Pradesh and Rajasthan--in the light of the high number of COVID-19 cases there, hours after a minister said it has "suspended" air travel from these states.

Seeking to clarify his statement, Law and Parliamentary Affairs Minister J C Madhuswamy maintained that Karnataka has not sought imposing a ban on flights from the five states as reported in some sections of the media. "India is flying high. Domestic operation figures for May 27, 2020 (till 23.59 hrs): Departures 460 with 34,336 passengers handled. Arrivals 464 with 33,525 passengers handled," Puri had said earlier in the day on Twitter.

If a flight takes off before midnight and lands in another airport after midnight, its departure and arrival are counted on different days, leading to a seeming mismatch in the figures of a particular day.

The Delhi airport, India's busiest airport, is scheduled to handle 147 departures and 145 arrivals on Thursday, said senior government officials. The Mumbai airport's operator MIAL said it handled a total of 50 domestic flights on Thursday. International passenger flights continue to remain suspended in the country.

Airports in West Bengal, Andhra Pradesh, Maharashtra, Telangana and Tamil Nadu have been allowed to handle a restricted number of daily flights as these states do not want a huge influx of flyers amid the rising number of COVID-19 cases.

While domestic services resumed in Andhra Pradesh on Tuesday, they restarted in West Bengal on Thursday.

Though domestic flight operations across the country began on May 25, they could not be restarted in Kolkata and Bagdogra as the state's machinery was involved in relief and restoration work after cyclone Amphan's devastation.

"Welcome Back, Passengers! Kolkata Airport saw the arrival of 122 passengers from @DelhiAirport after two long months and 40 passengers departed to Guwahati. Proper checks were followed, and regular sanitization was carried out in the terminal which was abuzz with passengers," the Kolkata airport tweeted.

On Thursday, eleven flights took off from Kolkata and an equal number arrived in the city, sources at the Netaji Subhas Chandra Bose International Airport said.

"A total of 1,745 passengers arrived and 1,214 passengers flew out of the city today (Thursday)," airport sources said.

The airports in Kolkata and Bagdogra are permitted to handle 20 daily flights each from Thursday onwards.

While it is not clear how many flights were handled by the Bagdogra airport on Thursday, the officials said 899 passengers arrived while 484 passengers departed from the airport during the day.

The West Bengal government recently came up with a set of guidelines for people arriving in the state on domestic flights.

According to it, those entering the state from Thursday must submit a self-declaration form, stating that they have not tested positive for COVID-19 in the past two months.

The passengers will also need to undergo health screening after they arrive at the airport, the state's guidelines said.

New Delhi, Apr 15: As the world grapples with coronavirus, researchers have found the presence of a different kind of coronavirus -- bat coronavirus (BtCoV) --in two bat species from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu, according to a study by the Indian Council of Medical Research (ICMR).

There is no evidence or research to claim that these bat coronaviruses can cause disease in humans, said Dr Pragya D Yadav, Scientist at the National Institute of Virology (NIV), Pune and also the first author of study.

The study has been published in the Indian Journal of Medical Research,

Twenty-five bats of Rousettus and Pteropus species from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu were found positive for BtCoV in Kerala, Himachal Pradesh, Puducherry and Tamil Nadu.

"These bat coronaviruses have no relation with SARS-CoV2 responsible for the COVID-19 pandemic," Yadav said, adding that Pteropus bat species were earlier found positive for Nipah virus in 2018 and 2019 in Kerala.

"Bats are considered to be the natural reservoir for many viruses, of which some are potential human pathogens. In India, an association of Pteropus medius bats with the Nipah virus was reported in the past. It is suspected that the recently emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) also has its association with bats," the objective of the study titled 'Detection of coronaviruses in Pteropus and Rousettus species of bats from different states of India' stated.

"In the present scenario of changing demography and ecological manipulations, it is challenging to have checks on the encounters of bats with other animals and humans," the study stated, highlighting that the need for active and continuous surveillance remains crucial for outbreak alerts for bat-associated viral agents with epidemic potential, which would be helpful in timely interventions.

"Although CoVs in the subfamily coronavirinae do not usually produce clinical symptoms in their natural hosts (bats), accidental transmission of these viruses to humans and other animals may result in respiratory, enteric, hepatic or neurologic diseases of variable severity. It is still not understood as to why only certain CoVs can infect people," the study said.

The scientists stressed on the need of proactive surveillance of zoonotic infections in bats.

The detection and identification of such viruses from bats also recommends cross-sectional antibody surveys (human and domestic animals) in localities where the viruses have been detected.

Similarly, if the epidemiological situation demands, evidence-based surveillance should also be conducted, the study said while emphasing on the need of developing strong mechanisms for working jointly with various stakeholders such as wildlife, poultry, animal husbandry and human health departments.

"In conclusion, our study showed detection of bat CoVs in two species of Indian bats. Continuous active surveillance is required to identify the emerging novel viruses with epidemic potential," Dr Yadav said.

Elaborating on the study, Dr Yadav said throat and rectal swab samples of two bat species -- Rousettus and Pteropus -- from seven states were screened for the bat coronvirus during which the representative samples collected from Kerala, Himachal Pradesh, Puducherry and Tamil Nadu tested positive while those from Karnataka, Chandigarh, Punjab, Telengana, Gujarat and Odisha came out negative.

The reverse-transcription polymerase chain reaction (RT-PCR) tests and sequencing were used for the confirmation of the findings.

"This is an ongoing study to understand the prevalence of the Nipah virus in bats," she said.