China announced on Sunday two new confirmed cases of coronavirus and four new asymptomatic cases, including one person without symptoms of COVID-19 on a chartered flight from Germany.
The two confirmed cases in Shandong province on Saturday compared with four cases the day before, data from the country's health authority showed.
The National Health Commission (NHC) confirmed three new asymptomatic cases on Saturday.
On Sunday, the Chinese city of Tianjin confirmed one asymptomatic person, a passenger arriving from Frankfurt on a chartered Lufthansa flight, LH342, to Tianjin. This case was discovered between midnight and 6 a.m. local time on Sunday, the city's daily statements show.
These charter flights are part of an accelerated entry procedure offered by Beijing as China and Germany seek to reignite their economies after months of lockdown. The flight to Tianjin carried about 200 passengers, mostly German business executives.
Frequently Asked Questions
A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.
There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.
Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.
Lufthansa has another charter flight scheduled for Shanghai on Wednesday.
A 34-year-old German engineer tested positive for the coronavirus after arriving in Tianjin but he does not have any symptoms, the Tianjin government said on its official social media platform Weibo.
The asymptomatic patient has been transferred to a local hospital to be placed under medical observation, the Tianjin government said, adding that the whole process was a "closed loop", meaning posing no great risk to the Chinese public.
The number of confirmed cases in the mainland as of May 30 stood at 83,001, data form NHC showed.With no new deaths reported, the death toll in the country remained at 4,634.