How do you know that coronavirus vaccine will be developed in 5 -6 month ? Did you have any official news for this ?
The pandemic will remain until the vaccine will be developed. If the casinos are opened, then this does not mean that pandemic era is over.
Here in India they (Bharat Biotech) have just started the phase-1 of human trials and I don't know whether they will be successful or not. Dozens of vaccines are currently going through various phases of clinical trials around the world. According to the RAPS COVID 19 vaccine tracker (
https://www.raps.org/news-and-articles/news-articles/2020/3/covid-19-vaccine-tracker), two of the vaccines are currently undergoing Phase-3 (final) human trials. They are:
1. Vaccine developed by Wuhan Institute of Biological Products (China)
2. CoronaVac developed by Sinovac Research and Development Co., Ltd. (China)
I am not sure whether their Phase 3 trials will be successful or not. I am just being optimistic. If the trials are successful, then vaccines will be available in the market by the end of this year.
BTW, two other vaccines are currently undergoing Phase 2 and Phase 3 trials simultaneously (they haven't completed Phase 2). These are:
1. AZD1222 from The University of Oxford & AstraZeneca (UK)
2. Vaccine from University of Melbourne and Murdoch Children’s Research Institute (Australia)