Which of the following statement is true about mumps?
Mumps may involve parotid, submandibular salivary gland.
Patient is infectious 7 days before to 7 days after onset of parotid swelling.
Mumps orchitis can lead to atrophy of testis, but does not frequently cause infertility.
Meningoencephalitis may occur before, along with or following the parotitis.