Neither of these things are guaranteed to happen if you get the flu vaccine when you are sick, but they are possibilities. If you have just a mild illness, there is no reason to wait to get vaccinated.
Early in the day, let roast stand at room temperature at least 1 hour before cooking. Preheat oven to 375 degrees. Rub meat ... the outside and rare in the middle. Meat will be very brown ... stand at room temperature for at least one hour.
Place the roast on a rack in a roasting pan, fat side up. If you donât have a rack you could coil some tin foil and use that as a rack. Put the roast in the 450 degree preheated oven. The hot temperature is going to give the roast a nice golden color.