Though Coronavirus is a newly identified type which has caused a recent outbreak of respiratory illness,but,for sure some tests are used to track COVID 19 in USA,France and Singapore, I think
Research done so far telling COVID-19 is very different virus and disturbing one (difficult to understand). When patient recover (according to the determined threshold) they discharge the patient, however patient come again with the symptoms (because we don't know, yet, the correct threshold of this virus). So now you can think what should be the probability to acquired resistance after one infection. But I think with the passage of time and supplementation of vaccines (when ready) the human body could be able to induce immunity. So far lab. vaccines are not guaranteed will work or not. However, fully recovered patients have showed antibodies against COVID-19 and even considered for therapy but very difficult to produce in large volumes.
It will take time to develop resistance against Covid-19. It is believed that those who have better immunity can tolerate Covid-19 and might not suffer. The resistance has direct relation to one's immunity.
There is more chances of survival from COVID-19 if person have a strong Immune system. And strong immune system person mean strong resistance for the virus. Till now I didn't read any article in which it is mentioned that a person is recovered by themselves without treatment.
Recovered patients showed antibodies, but there is no information yet how long immunity lasts. Survivors of SARS-Co1 seemed to have long term immunity.
Though Coronavirus is a newly identified type which has caused a recent outbreak of respiratory illness,but,for sure some tests are used to track COVID 19 in USA,France and Singapore, I think
At this early stage of understanding the new coronavirus, it is unclear where COVID-19 falls on the immunity spectrum. Although most people with SARS-CoV-2 seem to produce antibodies, “we simply don’t know yet what it takes to be effectively protected from this infection,” says Dawn Bowdish, a professor of pathology and molecular medicine and Canada Research Chair in Aging and Immunity at McMaster University in Ontario. Researchers are scrambling to answer two questions: How long do SARS-CoV-2 antibodies stick around? And do they protect against reinfection?
A recent article can help us all to understand the mysterious COVID 19 so far! https://www.who.int/news-room/commentaries/detail/immunity-passports-in-the-context-of-covid-19
A Spanish study has cast doubt on the feasibility of herd immunity as a way of tackling the coronavirus pandemic. The study of more than 60,000 people estimates that around just 5% of the Spanish population has developed antibodies, the medical journal the Lancet reported. The study is thought to be the largest of its kind on the coronavirus in Europe. Source: BBC
Yes because once we get infected our recovery from covid19 is mostly due to production of antibodies by our immune system. The next is now herd immunity which don,t sustain resistance for longer period.