What is the difference between Newcastle disease line 4, Lasota and clone 30?

What is the difference between Newcastle disease line 4, Lasota and clone 30? -- I feel that the Newcastle disease Lasota vaccine and the Newcastle disease four-line vaccine should belong to the same type, with different names, and belong to the medium virulence type, while clone 30 once again weakens the strain and belongs to the low attenuated vaccine. Let's discuss it together-- thank you for the answer from my friends upstairs, and ask more friends to answer questions-- the four-line vaccine is the lasota strain, which belongs to attenuated virus. Clone 30 can be obtained by weakening the clone of this strain, which is slightly weaker than that of the four lines. Clone 30 is better than four lines in breaking through maternal antibody and average antibody. In fact, oil seedlings are also produced after inactivation of four-line strains. Thank you for the answer from my friend upstairs! -- the four-line vaccine is the lasota strain, which is attenuated. Clone 30 can be obtained by weakening the clone of this strain, which is slightly weaker than that of the four lines. Clone 30. Anonymous @ Tao was published on 2009-11-18 04:50. The friend upstairs in PM said it was very comprehensive, basically that's it. Thank you very much! -- what was said on the first floor is good-- more friends are welcome to express their opinions. -agree.