Take seroprevalence results from dataset generation functions, compare comparison with
observed/template seroprevalence data and calculate likelihood
     
    
    Usage
    sero_data_compare(model_sero_values = c(), obs_sero_data = list())
 
     
    
    Arguments
- model_sero_values
 
Seroprevalence values from dataset generation function (no. positives/no. samples)
 
- obs_sero_data
 
Seroprevalence data for comparison, by year and age group, in format
  no. samples/no. positives
'