Despite ongoing concerns about the spread of Ebola and its effect on tourism, Morgan Stanley has recommended investors to buy shares of UK-listed airline peers Easyjet, Ryanair and IAG, hailing the companies' fundamentals.The bank has reiterated its 'overweight' rating on each stock, and lifted its target prices slightly for all three."Against a context of Ebola concerns, materially changed currency rates and oil price declines in recent weeks, and varying macro datapoints, we maintain our stock preference for EZJ, RYA and IAG," it said.Morgan Stanley said that the market is underappreciating the airlines' efficiency measures."The management winners in the industry are those who exploit this asset advantage by choosing the most efficient aircraft asset, work to match its supply most accurately to demand, and capture the most advantageous financing terms for its acquisition or lease," it said.Meanwhile, it believes that the recent slump in the price of oil is not being reflected in share prices.However, it did watch that low fuel prices, if sustained, could create more competition from emerging carriers.Easyjet was up 0.1% on Monday morning, Ryanair gained 0.6%, while IAG rose 0.7%.