The government aims to ramp up India's daily testing capacity for Covid-19 to 45 lakh by end of June from the current capacity of 16-20 lakh per day, the Centre said on Thursday as a record 20.55 lakh tests were conducted in a span of 24 hours.

On augmenting testing for Covid-19, while ICMR has so far approved a home-based rapid antigen testing (RAT) kit manufactured by Mylab Discovery Solutions Ltd in Pune, ICMR Director General Balram Bhargava said kits by three more companies are in pipeline and likely to get approval within a week.

Bhargava said kits for home testing will be available in the market in 3-4 days.

Besides, Bhargava said for ramping up capacity the ICMR has validated more than 105 Rapid Antigen Tests companies and approved 41 of them.

"We are doing 16-20 lakh tests this week and we have a capacity of about 20 lakh tests by end of the month and upto the end of next month we can have the capacity of up to 45 lakh because ICMR has validated more than 105 RAT companies and approved 41 of them and 31 of them are indigenous," he said.

Out of the 45 lakh tests, 18 lakh will be RT-PCR, while 27 lakh will be Rapid Antigen Tests.

More than 20.55 lakh tests were conducted in a span of 24 hours, the highest ever conducted in a single day in India.

He further said all the states have placed the order and they are rapidly enhancing their testing capacity.

"For home testing, you buy a test kit from a chemist shop then download a mobile app, register and read the user manual and then you conduct the test yourself and click the mobile image and upload the mobile phone gives test result. This ensures patient confidentiality, the data stored in a secure server and linked with the ICMR database," he said.

In large cities, Bhargava said the focus was mainly on RT PCR which is the standard test but at the district level, the backbone of testing has been TrueNAT and CBNAAT, while in rural areas RAT is the backbone of testing.

"In the second wave, we have to increase the RAT testing, we have written to all chief secretaries and they have acted upon it. Multiple 24X7 RAT booths to be set up in cities, towns and villages.

"RATS to be allowed at all government and private healthcare facilities (no accreditation required). RAT booths to be set up with the community in schools, colleges, community centres, RWA offices etc. All RT-PCR and RAT test results should be uploaded on the ICMR portal," he said.

"We have encouraged testing at all primary health centres and sub-centres which are 1,87,601 so testing. Those testing positive can be isolated immediately and those testing negative and are still symptomatic. Their samples need to be sent for RT-PCR testing so they will have to go to a facility. But if the positivity rate is high then RAT will be able to isolate them very fast," he said.

Bhargava said there are 2,553 government and private Covid testing laboratories established across the country over the last 16 months.

Citing a study, he said that 50 per cent of people do not wear a mask.

"Of the 50 per cent wearing a mask, 64 per cent cover their mouth but not the nose, 20 per cent have it on the chin and 2 per cent have them on the neck," he said, adding that 2,000 people were surveyed across 25 cities for the study.

Health Ministry Joint Secretary Lav Agarwal said a continuous decline in the Covid-19 active cases has been noted in the last 15 days.

"From being 17.13 per cent reported on May 3, the active cases now comprise 12.1 per cent of the country's total infections. A positive trend in recovery has also been noted. The recovery rate which was 81.7 per cent on May 3 has increased to 86.7 now," he said.

Agarwal said India has witnessed a consistent upward trend in weekly tests since mid-February with average daily tests increased by 2.3 times in the last 12 weeks.

"After a consistent increase in case positivity for 10 weeks, a decline in case positivity since the last two weeks has been reported," he added.

Agarwal said the country's positivity rate in the last 10 has been recorded less than 20 per cent and the positivity rate was recorded at 13.31 per cent on Wednesday which was the lowest in a month.

"Eight states have more than one lakh active cases, nine states have 50,000 to one lakh active cases and 19 states have less than 50000 active. A decline has been observed in six states which were major contributors to active cases in the country -- Karnataka, Maharashtra, Kerala, Rajasthan, Uttar Pradesh Gujarat," he said.

Seven states have more than 25 per cent positivity rate, while 9 states have between 20-25 positivity rate. Twenty-two states have more than 15 per cent positivity rate, 13 states have 5 to 15 per cent positivity rate and one state has less than 5 per cent positivity, he said.

Agarwal said the number of districts with a week-on-week increase in weekly tests and decline in positivity considered for the week has increased from 210 to 303 districts.

"Maharashtra, Rajasthan, Uttar Pradesh, Haryana, Gujarat, Chhattisgarh, Bihar, Madhya Pradesh, Delhi and Jharkhand are 10 states where a decline in cases and decline in positivity in the last 3 weeks have been observed," he added.

Tamil Nadu, Meghalaya Tripura, Manipur, Nagaland, Sikkim, Mizoram are states showing a rise in cases and a rise in positivity in the last three weeks, he said.

Agarwal further said that there are 89 districts where a decreasing trend in cases is being noted and there are 123 districts where a decreasing trend in case positivity is being observed for the last three weeks.