See all posts by Tom Rodgers Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Image source: Getty Images I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. The FTSE 100 soars on vaccine news! The cheap UK shares I’d buy now TomRodgers has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Tom Rodgers | Monday, 9th November, 2020 | More on: IAG Simply click below to discover how you can take advantage of this. Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. “This Stock Could Be Like Buying Amazon in 1997” Our 6 ‘Best Buys Now’ Shares Enter Your Email Address I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. The FTSE 100 has soared above 6,200 points on news of a Pfizer coronavirus vaccine, sending cheap UK shares rocketing.The American pharmaceutical giant told the world on 9 November that its drug candidate is more than 90% effective against Covid-19. Experts believed that the first set of vaccines might only be effective in treating 50% of patients. 5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…A shockwave of optimism rippled through stock markets across the globe, sending the price of the FTSE 100 leaping to heights not seen since August.I think that makes buying shares in cheap UK shares more viable than it seemed just 24 hours ago. What FTSE 100 shares to buyShares in unloved UK sectors like airlines, travel stocks and retail have been absolutely battered by the Covid-19 crisis. Many former FTSE 100 favourites have lost more than 70% of their value since the start of 2020.But for canny investors looking for cheap UK shares, it means a wealth of opportunities on the table now. I would start by looking at the sectors worst hit by the global lockdowns that stemmed from the coronavirus crisis.Fly me to the moonBritish Airways owner International Consolidated Airlines Group (LSE:IAG) rocketed by over 23% on the vaccine news. But shares in the airline operator are still more than 69.5% cheaper than in January. I said in June that I think IAG shares are a definite FTSE 100 bargain. I made the point then that cheap UK shares are most easily found when short-term demand is weakest for a company’s product. IAG suspended its dividend in April 2020 when global lockdowns hit. In May it said British Airways was burning through £178m in cash every week with planes just sat on the tarmac.And third-quarter results on 30 October showed the extent of the damage. IAG made an operating loss of €1.3bn compared to a 2019 operating profit of €1.425bn. Passenger capacity in Q3 was 78.6% lower than the same period in 2019. Across the first nine months of the year, numbers were down by 64.3%. But the news that we now could have a working vaccine means renewed hope for the travel sector. With a historically low P/E ratio of just 0.95, IAG shares are nothing if not undervalued, to my mind.And with the opportunity for global travel to restart, as earnings begin rising, IAG could reintroduce its dividend. Cheap UK shares to recoverA Covid-19 vaccine will take many months to filter through to the general population. Billions of doses will have to be produced, and that will take time. More tests and trials are needed and we are nowhere near the end of this horrible period in history.However, it is a speck of bright light in the darkness.I predict that there will be serious pent-up demand for passenger flights from millions of holidaymakers and business travellers. To me, that means IAG will see its share price rise, in tandem with other travel stocks that have had their value crushed in 2020. I’m thinking of the likes of FTSE 250 cruise operator Carnival and UK airline easyjet, for example.It has been a very difficult time for everyone to live through. And the idea of investing appears relatively unimportant in the face of such misery and loss. But buying cheap UK shares that have seen their values crash in 2020 could offer investors like me some of the best gains of their lives.