I am not telling lie. Do you know How long will it take to develop a coronavirus vaccine? What about Aids, Zika Virus,Ebola,Sars,Mars ? If you know then you will become afraid more. Lock down can slow only spread of the disease. But we will not get rid of it easily. There are around 10 vaccine currently in the works. But all are in initial stages. There have a lot of pandemic and epidemic which vaccine research still going on. Corona virus is more dangerous than others.

Zika virus

1st Identify: 1947
Vaccine : Research Going on.
Duration: 73 Years

Chiken pox

1st identify: 1953
Vaccine : Released at 1995
Duration: 42 Years.

Hepataitis B

1st Identify: 1965
Vaccine: Released at 1981
Duration: 16 years.

Ebola

1st Identify: 1976
Vaccine: Released at 2019
Duration: 42 years.

Aids

1st Identify:1981
Vaccine: Research going on.
Duration: 39 years.

Sars Virus

1st Identify: 2003
Vaccine: Research Cancelled.
Duration: 17 years.

Mars Virus

1st Identify: 2012
Vaccine: Research going on.
Duration: 8 years.

Covid19

1st Identify: December 2019
Vaccine: Research going on.
Duration: You have to guess.

Normally Developing a vaccine usually requires 5 to 20 years. Still there is no guarantee it will get license. Scientists have not been able to discover vaccines for many diseases in 20, 30, 50, 70 years.