But in the case of a fast-spreading pandemic like this, authorities simply can't wait that long -- and there aren't that many chickens and eggs immediately available.Some of these are mRNA vaccines, which direct cells in the body to make proteins to prevent or fight diseaseEven companies that traditionally make egg-based flu vaccines are jumping into the mix; Sanofi Pasteur Typically, clinical trials are broken into two phases. Mexico had reported its highest number of new daily cases.On May 21, people lower the coffin of a woman who died from the coronavirus in Srinagar, India.Cardboard cutouts of soccer fans are seen at the Borussia-Park stadium in Mönchengladbach, Germany, on May 19. Farmers deliver vegetables to a customer in Saint-Georges-sur-Cher, France, on March 29.People listen from their homes as priests conduct Sunday mass from a church roof in Rome on March 29.Gyorgy David Jablonovszky and his bride, Timea, are joined by close relatives during their wedding ceremony in Miskolc, Hungary, on March 28. A security official stands guard at the Great Hall of the People in Beijing as delegates leave the second plenary session of the National People's Congress.Olivia Grant, right, hugs her grandmother, Mary Grace Sileo, through a plastic drop cloth that was hung up on a homemade clothesline in Wantagh, New York, on May 24.Brian Carabine, a retired US Marine, replaces flags at the South End Cemetery in East Hampton, New York, just before Memorial Day.High school graduates turn their tassels during a drive-thru graduation ceremony at the Las Vegas Motor Speedway on May 22.This aerial photo shows gravediggers working at the Vila Formosa Cemetery, on the outskirts of Sao Paulo, Brazil, on May 22. It was Angelino, a professional soccer player with the German club RB Leipzig, takes a corner kick during a Bundesliga match against Freiburg on May 16. 13 February 2013 Families walk along a boulevard in Barcelona, Spain, on April 26. The state was going through with A man is sprayed with disinfectant prior to going to a market in Tirana, Albania, on Monday, April 6.Izzie, left, and Tippi wear ventilated dog masks in Philadelphia on April 6.People wait in line to bury loved ones at a cemetery in Guayaquil, Ecuador, on April 6. Nurseries in France were to gradually reopen on May 11.Refrigerated trucks are seen at a morgue that opened in New York to assist overwhelmed funeral homes.Migrant workers in New Delhi walk toward the Sarai Kale Khan Bus Terminus on May 3 after learning that the government was preparing to send migrant workers back to their home states during the lockdown. It means that your birds would not be exposed to disease. Phase 2, involving hundreds of people, would last another six to eight months.At least one Phase 1 coronavirus vaccine trial has now begun; the US study There is still a lot we don't know about the coronavirus, said Poon -- so the wide range of technologies being used to develop vaccines gives us a better shot at finding one that works. The city ordered People watch a video projection in Avignon, France, on July 18.
Magazine issue The parade marked the 75th anniversary of the Allied victory over Nazi Germany in World War II.A man rides past social-distancing markers in front of a shop in Brussels, Belgium, on May 9.A man pauses as he places the casket of a relative into a van at a busy New York funeral home on May 9.Health-care workers wait for citizens to arrive at the Anna International Airport in Chennai, India, on May 9.
Metropolitan Melbourne was placed under lockdown amid a Cars line up in the Hard Rock Stadium parking lot so drivers could be tested in Miami Gardens, Florida, on July 6.Peruvian migrant Jose Collantes cries as he watches cemetery workers bury his wife, Silvia Cano, in Santiago, Chile, on July 3.