Vermaelen accepts that the team's recent results have been "disappointing" but says there is enough quality at the Club to have grounds for optimism.
"Things can turn around really quickly and in these times you have to stick together as a group and as a Club," the captain said. "I'm really positive this group has the quality to win games again.
"At the moment a lot of players are coming back. We've never had so many fit players in the past as at the moment. I think our squad is strong enough.
"It's a little bit negative at the moment because we had two disappointing results. But in football it can turn really quickly and on Saturday [against QPR] it can be different again.
"That's the positive about England. You play so many games, sometimes three times a week, so you have another chance really quickly to get a good result again."