In regards to the SIR model, which of the following parameters canhuman behavior change in order to slow the spread of disease? SelectONLY the best answer.The contact rate (part of the Beta parameter).O The gamma parameter - the rate at which infection is cleared and immunity isgained.O The Delta parameter - the loss of immunity.

In a closed community, a SIR model computes the theoretical number of people infected with an infectious illness over time. The name of this group of models comes from the fact that they involve coupled equations linking the number of susceptible persons S(t), infected people I(t), and recovered people N(t). The SIR model was also employed during the spread of COVID.It determined the spread rate,recovery factors and spread factors of COVID. During covid LOCKDOWN was employed by almost every country and it slowed down the spread rate of virus.This led to decline in the graph of viral spread and strictly following this lockdown lead government to control the disease and look for those who have been infected. Option 1) The contact rate (part of beta parameters) can be modified by human behaviour at most.As in Covid LOCKDOWN proved to be a major step to decrease down the spread of disease.Reduction in the contact rate proved to be a ver helpful step in tackling with Covid and people allround world followed lockdown to their best. Option 2) the rate at which infection is cleared and immunity is gained is not that modifiable then the option 1.After someone gets infected ,infection eill take its time to complete incubation period then to present symptoms and then resolve but if before spread it can be avoided that's more right then this option. Option 3)loss of immunity:- it is also not modifiable by human behaviour.Lots of people have decreased immunity due to disease or old people or children. So better option that we can do is to don't let them come in contact with disease. Therefore option 1 is the answer to this question. Thanks and have a nice day.