There are multiple definitions:

1. multilamellar vesicle(English)

   • ULV

2. murine leukemia virus(English)

   • gammaretroviruses which may be both exogenous (transmits between individuals, i.e., horizontally) or endogenous (proviruses integrated into the germ line of mice and thereby being transmitted to the next generation, i.e., vertically)
   • HERV, XMRV, MLLV
   • Virology
   • https://doi.org…155/2011/341294

3. modified live vaccine(English)

   • main strategies used to control a CSF epidemic are systematic prophylactic vaccination and a non-vaccination stamping-out policy
   • CSF, CSFV, DIVA
   • Vaccination
   • https://doi.org…res.2013.10.025