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New Delhi, Jul 21: The Centre has written to all states and union territories warning against the use of N-95 masks with valved respirators by people, saying these do not prevent the virus from spreading out and are "detrimental" to the measures adopted for its containment.

The Director General of Health Services (DGHS) in the Ministry of Health, in a letter to the Principal Secretaries of health and medical education of states, said it has been observed that there is "inappropriate use" of N-95 masks, particularly those with valved respirators, by the public other than designated health workers.

The DGHS referred to the advisory on the use of homemade protective cover for face and mouth available on the website of the Ministry of Health.

"It is to bring to your knowledge that the use of valved respirator N-95 masks is detrimental to the measures adopted for preventing the spread of coronavirus as it does not prevent the virus from escaping out of the mask. In view of the above, I request you to instruct all concerned to follow the use of face/mouth cover and prevent inappropriate use of N-95 masks," DGHS Rajiv Garg said in the letter.

The government had in April issued an advisory on the use of homemade protective cover for face and mouth, asking people to wear it, particularly when they step out of their residences.

The advisory stressed such face covers must be washed and cleaned each day, as instructed, and stated that any used cotton cloth can be used to make this face cover.

The colour of the fabric does not matter but one must ensure that the fabric is washed well in boiling water for five minutes and dried well before making the face cover. Adding salt to this water is recommended, it said.

It also listed the procedures of making such homemade masks, asking to ensure it fits the face well and there are no gaps on the sides.

It urges people to wash hands thoroughly before wearing the face cover, switching to another fresh one as the face cover becomes damp or humid, and never reusing it after single use without cleaning it.

"Never share the face cover with anyone. Every member in a family should have separate face cover," the advisory stated.

India's COVID-19 case tally crossed the 11-lakh mark on Monday, while the total number of recovered patients increased to over seven lakh, according to Union health ministry data.

The death toll due to the disease rose to 27,497 with 681 fatalities reported in one day.

The ministry data updated at 8 am on Monday showed that a record single-day jump of 40,425 COVID-19 cases had taken the total number of cases to 11,18,043.

Mumbai, Jul 2: The Shiv Sena on Thursday termed the ban on 59 Chinese apps by the Indian government as a "digital strike" and asked if these apps were a threat to the national security, how did they operate for so many years.

An editorial in Sena mouthpiece 'Saamana' sought to know when did the Centre realise these apps were a threat to the national security.

By banning the Chinese apps, Prime Minister Narendra Modi protected the interests of Indian internet users and his courage has be lauded, the Marathi publication said.

India on Monday banned 59 apps with Chinese links, including TikTok, UC Browser, SHAREit and WeChat, saying they were prejudicial to sovereignty, integrity and security of the country.

"If these apps were a threat to national security, how is it that these apps were functioning without any hurdles for so many years. If the opposition says the government neglected national security,then what will the Centre's stand be?" the Shiv Sena asked.

It said questions should be raised on all the previous governments for "allowing national data to go out of the country".

China has expressed displeasure over the Indian government's decision, the Marathi daily said, adding that Chinese soldiers are "still not ready to leave the Galwan Valley (in Ladakh)".

The Sena said it took the sacrifices of 20 soldiers for the government to realise Indian data was being illegally taken out of the country.

"The government took revenge by a digital strike," it stated.

There have been complaints earlier that users' data on Chinese apps was illegally sent out of the country, and apps like TikTok were "promoting vulgarity", it said.

"Many TikTok stars had reportedly joined the BJP," the Sena claimed. "What will happen to them?" it asked.

There is a need to break China economically, but that will not happen by banning its apps. The issue is about trade and investment between the two countries, it said.

"The largest Chinese investment is in Gujarat.

Chinese company Huawei has got the contract to set up 5G network in India. This company having keys to India's digital economy is akin to the Chinese Communist Party owning the Indian economy in future," it said.

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.