The research suggests that due to strenuous exercise, elite athletes are more likely to inhale virus particles and direct them to the lower areas of the lung.
A round-up of Sunday's action in the South American World Cup qualifiers.
Daniil Medvedev fired Russia into the final of the ATP Cup on Saturday with a tense 3-6, 6-3, 7-5 win over an injury-hampered Alexander Zverev after the German destroyed a racket in frustration over a lost service break.
Brazil's Gabriel Jesus made one goal, scored another and was sent off in the second half as they beat Peru 3-1 to win the Copa America for the ninth time.
As the tournament gets to the next round here's look at the quarter-finalists.
Antoine Griezmann scored two goals and provided two assists as Barcelona staged a stunning last-gasp comeback before beating Granada 5-3
This was not quite Liverpool back to their best but it was an important statement of intent for Klopp's side that they will not be giving up their title without a fight.
Garbine Muguruza was relieved to finally avoid tripping at the last hurdle and end her trophy drought
Top seed Novak Djokovic made quick work of Tennys Sandgren at the Western and Southern Open on Tuesday, never dropping serve en route to a 6-2, 6-4 win over the American, while big-serving Milos Raonic enjoyed a straight sets win over Andy Murray.
Barcelona have one hand firmly on the La Liga title after winning 2-0 at Alaves on Tuesday, leaving them 12 points clear at the top of the table with four games to play.
Andy Murray powered his way to a third Shanghai Masters title by beating Spanish 15th seed Roberto Bautista Agut 7-6(1), 6-1 in Sunday's final to close in on Novak Djokovic at the top of the world rankings.
Playing his first match since injuring his knee at Indian Wells last month, Nadal showed no signs of rust as he raced into a 5-0 lead in the first set on Court Rainier III.
Liverpool may have to wait a little longer for their Premier League title celebrations after they were held to a 0-0 draw at Everton in the behind closed-doors Merseyside derby on Sunday.
The Brazilian had to be substituted in the second half of his side's 2-1 Premier League win at Tottenham Hotspur on Saturday after clashing with the hand of opposition defender Jan Vertonghen.
World No 1 Novak Djokovic, on Wednesday, became the first player to earn more than US$100 million in prize money after progressing through to the quarter-finals of the French Open in Paris.
'Everyone now has the technology and the information to prepare games down to detail. Many years ago you used to go to a World Cup and it was a surprise on the day and talent and decisions on the pitch made a bigger difference'
Aguero is expected to be the first of a number of arrivals at the Camp Nou this summer
Quaison fires Sweden to extra-time World Cup playoff win over Czechs
'This team is really good and we have invested a lot in it. Now we have to work with that'
Images from football matches played across Europe.
Roberto Firmino's 90th-minute header sent Liverpool back to the top of the Premier League with a 2-1 victory over Tottenham Hotspur, whose 11-match unbeaten run came to an end on Wednesday.
Italy coach Roberto Mancini believes that the postponement of Euro 2020 could work in his team's favour although a gap of 10 months between working with his players will create difficulties. Under his leadership, they finished their Euro 2020 qualifying group with a 100% record and are on a run of 11 successive wins.
Air travel by the top 20 footballers nominated for the 2019 Ballon d'Or was responsible for producing 505 tonnes of carbon dioxide (CO2) emissions this year alone, according to a climate change researcher.
Former Manchester City manager Roberto Mancini is in talks with Galatasaray to take over from Fatih Terim who was sacked as coach this week, the Turkish club said on Sunday.
Brazilian football legend Ronaldo could soon make his maiden visit to India.
Kingsley Coman scored one goal and set up another as Bayern Munich came from a goal behind to beat VfB Stuttgart 3-1 on Saturday and defend their top spot in the Bundesliga.
World No 1 Novak Djokovic and defending champion Andy Murray produced contrasting performances to secure their berths in the quarter-finals of the Madrid Masters on Thursday.
Spain's talisman Rafael Nadal sealed a sixth Davis Cup title for his country on Sunday when they beat Canada 2-0 in the final of the revamped event.
Images from the UEFA Champions League matches played on Tuesday.
Images from Day 2 of the 2022 Australian Open in Melbourne on Tuesday.
And what an exciting week it has been, with players returning to packed stadiums, some memorable individual and team performances and a medical incident which had the world on edge.
Leander Paes won his second Challenger level title of the season, lifting the Santo Domingo Open trophy with partner Miguel Angel Reyyes-Varela.
Liverpool moved into the Champions League qualifying spots after a 3-0 win at Burnley on Wednesday took them above Leicester City and into fourth place with one round of Premier League matches remaining.
Kyrgios was due to play Spain's Roberto Bautista Agut in the first round in Rome, but was replaced by lucky loser Alexandr Dolgopolov in the men's draw.
World number two Rafael Nadal has been named in Spain's squad for their Davis Cup World Group quarter-final against Germany in Valencia next month.
Christian Benteke wants to stay at Liverpool but is reluctant to commit his future to the Anfield club unless he gets more game time under manager Juergen Klopp. The former Aston Villa striker scored nine league goals during a mixed first season at the Merseyside club but made 15 of his 29 Premier League appearances from the bench. Benteke was signed by Klopp's predecessor, Brendan Rodgers, for 32.5 million pounds ($47.00 million) and under the German found himself behind Daniel Sturridge, Divock Origi and Roberto Firmino in the pecking order.
Liverpool will play the winner of Wednesday's other semi-final between Ajax Amsterdam and Tottenham Hotspur with the Dutch side leading 1-0 from the first-leg in London.
Roberto Martinez's Belgium collected two wins, including their first in the UEFA Nations League over Iceland earlier this month, to bring them level with France on 1729 points.
Wigan Athletic's shock 1-0 win over Manchester City in the FA Cup final on Saturday not only caused one of the biggest upsets in the competition's history but could dictate the immediate futures of both managers.
Off-court distractions and a neck injury could not prevent Novak Djokovic from extending his winning run this year to 23 matches and the Serbian could not be in more intimidating form ahead of the US Open.
© 2026 Rediff.com - Investor Information - Advertise with us - Disclaimer - Privacy Policy - Sitemap - Feedback - About us - Terms of use - Grievances