Ole Gunnar Solskjaer will hold a meeting with his Manchester United stars to encourage them to get vaccinated.Solskjaer has revealed that some members of his squad have not had the Covid jab due to fears about how it could affect their health and fitness.United had to call off last weekend's pre-season friendly at Preston after nine members of the squad and coaching staff tested positive, before further tests returned negative results 24 hours later.But Solskjaer has warned his players of the dangers not being double jabbed could cause, in terms of the huge disruption it could have on United's season.And he will urge all his stars to get fully vaccinated against the pandemic as soon as possible.Solskjaer said: "The Preston situation I think.