This summers Olympic and Paralympic Games in Rio could trigger a full-blown global health disaster and must be postponed or relocated, according to a professor writing in the Harvard Public Health Review. Amir Attaran, professor of law and medicine at the University of Ottawa, says the outbreak of the Zika virus is more dangerous and extensive than previously thought and its inevitable spread worldwide may be accelerated when an estimated 500,000 foreign tourists visit Rio for the Games.The current Zika outbreak was first identified in Brazil in April 2015 and has been linked to cases of microcephaly - when babies are born with below-average head sizes - across large parts of South and Central America. Professor Attaran wrote: Zika infection is more dangerous, and Brazils outbreak more extensive, than scientists reckoned a short time ago. Which leads to a bitter truth: the 2016 Olympic and Paralympic Games must be postponed, moved, or both, as a precautionary concession.All it takes is one infected traveller. Analyses establish that Brazils cataclysmic outbreak stems from a single viral introduction event likely between May and December 2013. A few viral introductions of that kind, in a few countries, or maybe continents, would make a full-blown global health disaster. It has been claimed that Rio is at the heart of the Zika outbreak Mass migration into the heart of an outbreak is a public health no-brainer. Putting sentimentality aside, clearly the Rio 2016 Games must not proceed.Zika is carried and spread by mosquitoes, although there have also been reported cases of sexual transmission.It was initially linked only to severe birth defects, but subsequent clinical studies have also shown health implications for adults, including the debilitating and sometimes fatal Guillain-Barré syndrome.The outbreak has been declared a global public health emergency by the World Health Organisation (WHO), but the International Olympic Committee (IOC) stated earlier this year that Rio was only on the periphery of infected areas and that the Games could proceed safely.However, Professor Attaran wrote: Rio de Janeiros suspected Zika cases are the highest of any state in Brazil (26,000), and its Zika incidence rate is the fourth worst (157 per 100,000). Or in other words: according to Brazils official data, Rio is not on the fringes of the outbreak, but inside its heart. The International Olympic Committee insists the Games will be safe Proceeding with the Games violates what the Olympics stand for. How socially responsible or ethical is it to spread disease?When contacted by Sky Sports, the IOC replied with a statement that read: We are working with our partners in Rio on measures to deal with the pools of stagnant water around the Olympic venues, where the mosquitoes breed, to minimise the risk of visitors coming into contact with them. It is also important to note that the Rio 2016 Games will take place during the winter months of August and September, when the drier, cooler climate significantly reduces the presence of mosquitoes and therefore the risk of infection.The Olympic Games take place from August 5-21, with the Paralympic Games following from September 7-18. 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The Celtics closed out their first preseason under Stevens on Wednesday night with a 101-97 victory over the Brooklyn Nets, who rested a lot of their lineup including former Celtics Kevin Garnett and Paul Pierce. Vapormax 2019 Blanche . -- Vincent Lecavalier got everything but the desired result in his return to Tampa Bay. MADRID -- Sergio Ramos only contribution to Spain in a World Cup qualifier this weekend will be a pep talk to his teammates.Ramos visited the teams training camp this week ahead of Saturdays match against Macedonia, but the captain wont be on the field in the southern city of Granada because of an injury -- one of the many players missing as Spain tries to defend its Group G lead in European qualifying.Spain coach Julen Lopetegui also wont be able to count on playmaker Andres Iniesta, striker Diego Costa, defender Gerard Pique, left back Jordi Alba and defensive midfielder Javi Martinez.Costa was the latest to be dropped from the squad on Thursday, being released because of a thigh injury that had kept him from practicing with the rest of the squad during the week. Celta Vigo forward Iago Aspas was named as his replacement, joining the national team for the first time.We are going to try to turn difficulties into opportunities, Lopetegui said. We cant lament anything. Im happy with the players that we called up, and they are going to help us achieve victory in both matches.Three days after hosting Macedonia, Spain will play a friendly against England at Wembley Stadium.Lopetegui will have to work extra hard to set up his defense, which is not used to being without veteran central defenders Ramos and Pique at the same time. Ramos is nursing a left knee injury, while Pique is recovering from sprained ligaments in his right ankle.Weve had to restructure the defense the best way possible, Lopetegui said, not dismissing the possibility of having to improvise with right back Cesar Azpilicueta at center back.The Chelsea player has played in the position in tthe past.ddddddddddddther options for Lopetegui include Real Madrids Nacho Fernandez, Real Sociedads Inigo Martinez, Sevillas Sergio Escudero and Borussia Dortmunds Marc Bartra.With Costa not playing up front, Alvaro Morata and Aritz Aduriz should get a chance to perform alongside each other in the lineup. Other forwards in the squad include Lucas Vazquez, Manuel Nolito Agudo, Jose Callejon and Victor Vitolo Machin.Its great to have so many options, said Aduriz, who was called up after scoring five goals in an Athletic Bilbao win in the Europa League last week. We are all here to help.At midfield, it will be difficult to substitute for Iniesta, who has been sidelined because of right knee injury. Among the options available for Lopetegui are Juan Mata, Thiago Alcantara and Jorge Koke Resurreccion.Some important players couldnt come because of injuries, but that creates an opportunity to those who are here, reserve goalkeeper Sergio Asenjo said.Spain and Italy have seven points each after three games in Group G, with the Spaniards ahead on goal difference. Albania and Israel are one point behind, while Macedonia and Liechtenstein have yet to earn points.Italy plays at Lichtenstein the same day that Spain hosts Macedonia.Only the group winner automatically secures a spot for the World Cup in Russia. The second-place team must go through a playoff to try to make it to the 2018 tournament.Spain is coming off a 2-0 win at Albania. Italy and Spain drew 1-1 in Turin in October.---Tales Azzoni on Twitter: http://twitter.com/tazzoni ' ' '