Consider the following statements regarding the Nipah Virus (NiV):
1. It is an orthopoxvirus.
2. NiV is a zoonotic disease transmitted from animals to humans.
3. Polymerase Chain Reaction (PCR) is the preferred laboratory test for NiV.
4. The incubation period ranges from 4 to 14 days on average.
How many of the above statements is/are correct?