Virus Verdacht Cannabis

Not a virus, which are almost impossible to get as a home grower unless you visit tobacco fields and import infected soil or have very poor garden hygiene practices and/or re-use old soil mixes, or bring it in on infected plants from disreputable breeders. Your leaves are normal and there is no need to worry. They leaves are very dark green though, indicating long term over feeding. In soil, feeding full strength ferilizers more often than every 10 days can cause issues in my experience. Half strength every 7 days seems to cause the least problems. Remember too, it is very, very easy to correct a slightly under fed plant, but very, very difficult to rescue a burned and damaged over fed plant.