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The deadly coronavirus that entered India while there was still nip in the air has beaten rising mercury, humid conditions, unique Indian genome and has entered monsoon season with more potency as fresh cases are only breaking all records in the country.

India recorded a single-day spike of record 24,850 new coronavirus cases on Sunday, taking its total tally to 6.73 lakh corona-positive cases.

Top Indian microbiologists were hopeful in March that after the 21-day lockdown, as summer approaches, the rise in temperature would play an important role in preventing the drastic spread of COVID-19 virus in India.

Several virologists hinted that by June this year, the impact of COVID-19 would be less than what it appeared in March-April.

The claims have fallen flat as the virus is mutating fast, becoming more potent than ever.

According to experts, the novel coronavirus is a new virus whose seasonality and response to hot humid weather was never fully understood.

"The theory was based on the fact that high temperatures can kill the virus as in sterilisation techniques used in healthcare. But these are controlled environment conditions. There are many other factors besides temperature, humidity which influence the transmission rate among humans," Dr Anu Gupta, Head, Microbiologist and Infection Control, Fortis Escorts Heart Institute, told IANS.

There is no built-up immunity to COVID-19 in humans.

"Also, asymptomatic people might be passing it to many others unknowingly. New viruses tend not to follow the seasonal trend in their first year," Gupta emphasized.

Globally, as several countries are now experiencing hot weather, the World Health Organization (WHO) reported a record hike in the number of coronavirus cases, with the total rising by 2,12,326 in 24 hours in the highest single-day increase since COVID-19 broke out.

So far over 11 million people worldwide have tested positive for the disease which has led to over 5,25,000 deaths, according to data from Johns Hopkins University. The US remained the worst-hit country with over 28 lakh cases, followed by Brazil with 15.8 lakh.

According to Sandeep Nayar, Senior Consultant and HOD, Respiratory Medicine, Allergy & Sleep Disorders, BLK Super Speciality Hospital in New Delhi, whether temperature plays a role in COVID-19 infection is highly debated.

One school of thought said in the tropical regions of South Asia, the virus might not thrive longer.

"On the other hand, another school of thought has found that novel Coronavirus can survive in a hot and humid environment and tropical climate does not make a difference to the virus. According to them, this is what distinguishes the novel coronavirus from other common viruses, which usually wane in hot weather," stressed Nayar.

Not much has been studied in the past and no definite treatment or vaccine is available to date.

"Every day, new properties and manifestation of the disease come up. As of now, the only way to prevent this monster is by taking appropriate precautions. Hand hygiene, social distancing, cough etiquette and face masks definitely reduce spread of COVID-19 infection," Nayar told IANS.

Not just top Indian health experts, even Indian-American scientists had this theory in mind that sunshine and summer may ebb the spread of the coronavirus.

Ravi Godse, Director of Discharge Planning, UPMC Shadyside Pennsylvania in the US told IANS in April: "In the summer, the humidity can go up as well, meaning more water drops in the air. If the air is saturated with water and somebody sneezes virus droplets into such air, it is likely that the droplets will fall to the ground quicker, making them less infectious. So the short answer is yes, summer/sunshine could be bettera.

According to Dr Puneet Khanna, Head of Respiratory Medicine and Pulmonology, Manipal Hospital, Delhi, COVID-19 death rates are not too different in tropical countries but since the disease affected them late it was yet to show its peak in these areas.

"The virus can survive well in hot and humid countries and this is proven now," he stressed.

Even more than three years after demonetisation and all-out efforts to make most transactions through electronic, cash is still king, as it thrives in a digital India, said fintech start-up Paytm founder Vijay Sekhar Sharma.

"While cashless economy is not possible in India, less cash economy will be in the future. Less cash is the only solution, not the elimination of cash," Sharma told IANS in an interview after unveiling an all-in-one payment gateway on Tuesday.

Asserting that it would take 5-10 years for India to make the transition to digital payments from the traditional mode of cash, Sharma, 41, said the e-payment industry benefitted more from the November 8, 2016 note ban and withdrawal of old Rs 1,000 and Rs 500 denominations.

"I think it (demonetisation) helped the industry despite lack of specific help. But the world has changed since then. It is about the scale of distribution of merchants that is what is propelling digital payments," said Sharma.

Most of the cash not only came back into circulation, but also remains as the mode of payment for the majority due to its convenience for the people used to such transactions.

Expounding Paytm's zero service charge, Sharma said the strategy is sustainable as it leads to acquiring more customers and merchants, enabling newer business opportunities.

Paytm also does not levy a service charge to small merchants for its payments services, unlike organised players like Uber.

"Though there is a monetisation model, the merchants who are small shopkeepers, become our financial services customers as they open a bank account, which is profitable."

Paytm secured a Payments Bank license from the Reserve Bank of India to offer a savings bank account, Rupay debit card and money transfer services.

"We are banking on payment services acquiring customers and merchants who avail banking, lending, insurance, wealth and software services like billing software and business ledger software services eventually," Sharma noted.

The mobile first bank services include zero balance and zero digital transaction charge accounts.

"Basically, payments, cloud, commerce and financial services are a cohort we follow. So, payments is our customer as well as merchant acquisition. If it breaks even, we are happy because other line items make more money, he affirmed.

Noting that in a market like India, one cannot price services at a premium unlike in a developed country like the US, the billionaire businessman said a consumer in a developing country would not be able to afford such a hefty charge.

Forbes ranked Sharma as India's youngest billionaire in 2017, with a net worth of $2.1 billion.

While several countries operate on the model of higher service charges, Sharma said newer business models have to be discovered in India, as customer lifecycle value is accounted for more stages than in other nations.

Asked about an upscale retailer like Zara not giving a wallet payment option during its recent end of season sale in Bengaluru, Sharma said Paytm was addressing such hiccups with its all-in-one payment solutions.

"It's an opportunity, because if the retailer has our all-in-one point of sale machine, where in they enter the amount, it shows both the Quick Response code (QR) and card payment options," he observed.

Sharma compared older swiping payment machine to feature phones and modern ones to feature-rich smartphones.

"If you notice, they look like feature phones and the modern day card machine is more a smartphone like. You can add the smatphone components, which can add the features," reiterated Sharma.

Though Paytm's all-in-one QR point of sale machine integrates the billing system, its chief executive said it was not ideal to have an independent QR feature.

Paytm has 16 million strong merchant user base, which Sharma aims to raise to 26 million base in the next one year.

Sharma has launched in this tech city an all-in-one payment gateway and Paytm Business Payments solution, which enable digital payments through multiple methods for small and medium enterprises (SMEs) and an Android point of sale machine.

With the new gateway solution, collecting digital payments through multiple methods can be achieved seamlessly while Paytm Business Payments solution enables automated vendor payments, including employee salaries and customer refunds among others.

The One97 Communications-owned Paytm aims to help SMEs streamline and digitise their business activities using its new solutions, which enhance the overall efficiency of both accepting and making payments.

Paytm has a data bank of over 200 million saved cards and bank accounts, a feature which enables partner apps to shorten transaction times and propel faster conversions while using the all-in-one payment gateway.

Complementing the two solutions, Sharma also launched an all-in-one Android point of sale machine, which can accept payments through all forms such as cards, wallets, UPI apps and even cash.

The device has a QR code that supports all contact and contactless payments, coming with integrated billing software customized solutions for different sectors such as catering, ticketing, parking and others.

The handheld Android device is equipped with an in-built printer, scanner and can also generate bills.

Valued at $16 billion, Paytm is not alone in the fiercely competitive Indian fintech space where a dozen players like PhonePe, MobiKwik, Kotak 811 and deep pocketed international giants Google Pay and Amazon Pay are in the fray.