The country recorded two more relapses Wednesday evening, bringing the total number of relapses to 11. Of the 270 confirmed infections, 51 are active cases as 219 have been discharged from hospitals. 14 have tested negative at least once.

A medical staff at HCMC Hospital of Tropical Diseases performs Covid-19 test on samples, April 2020.

Deputy Prime Minister Vu Duc Dam on Wednesday assigned the Ministry of Science and Technology, the Ministriy of Health and related agencies to research and develop vaccines for the virus.

Medical experts have yet to identify reasons for Covid-19 relapses. The health ministry said earlier that the weak immune systems could be a cause, allowing the virus to stay on.

It said on Tuesday that tests of samples taken from five relapsed patients showed the virus was "inactive" in their bodies, which theoretically means the chances of them spreading the infection to others are "very low."

Other countries in the world have also reported Covid-19 relapses. In South Korea, at least 222 people have tested positive for the virus again after recovering. China and Brunei have reported relapses too.

In Vietnam, there are more than 34,000 people in quarantine and health monitoringed at the moment. All patients are being treated at six different hospitals, most are in stable condition, of which 10 cases were tested negative once, four cases were negative one time.

The health ministry Wednesday stated that it noted an abnormality in the price of Realtime PCR machines for testing Covid-19 in some localities, asking the Ministry of Public Security to clarify and strictly handle it.

The Covid-19 pandemic has spread to 210 countries and territories, with more than 227,000 deaths reported so far.

The time between exposure to Covid-19 and the moment when symptoms start is commonly around five to six days but can range from 1 - 14 days, according to the World Health Organization.

No new cases recorded in Vietnam for eight days straight

For the eighth day in a row, there have been no new cases of Covid-19 recorded in Vietnam. The last person to test positive for coronavirus was a teenage girl on April 16 in Ha Giang Province.

Vietnam reports no new Covid-19 cases for a week

There have been no new Covid-19 cases detected in Vietnam for a whole week, reported the National Steering Committee for Covid-19 Prevention and Control on April 23 morning.

Vietnam records no more Covid-19 cases for four consecutive days

As of 7 am April 20, 2020, Vietnam has recorded no more Covid-19 cases for four consecutive days

Number of Covid-19 cases remains at 268 with no new cases on April 20

No new case of Covid-19 was detected over the past 12 hours, so the number remained at 268 as of 6 am on April 20, according to the National Steering Committee for Covid-19 Prevention and Control.

No new case of COVID-19 reported on April 19 morning

No new case of Covid-19 was detected as of 6am on April 19, making it three full days the country has gone without any new infection of the coronavirus, according to the national steering committee for Covid-19 prevention and control.

Source: VnExpress