The spread of the Delta strain of the new crown mutant virus is accelerating worldwide, and the epidemic is resurgent or even at its peak in several countries and regions, making the global fight against the epidemic a serious challenge.
The Delta strain is sweeping the world at a rapid pace. According to the latest data from the World Health Organization, it has emerged in at least 132 countries and regions in the week ending July 25, leading to a surge in confirmed cases and deaths of new cases. The World Health Organization previously predicted that the Delta strain is highly transmissible and will become a major global epidemic in the coming months.
Data from the U.S. Centers for Disease Control and Prevention show that the number of confirmed cases of new coronary heart disease is currently climbing in nearly 90% of the country, with a significant rebound in key indicators, which is strongly related to the accelerated spread of the highly infectious Delta strain, which is estimated to account for 83.2% of all new confirmed cases in the U.S. recently.
According to Yonhap News Agency 29, the number of new confirmed cases in South Korea on a single day has exceeded 1,000 for 23 consecutive days, with a significant increase in the number of cases infected with the Delta strain. South Korea’s Central Emergency Response Headquarters official Sun Yeong-rae said on the 26th, from July 18 to 24, the proportion of new confirmed cases of Delta strain infection in South Korea was 48%.
The French Ministry of Health said on the 25th that France is experiencing the fourth wave of the epidemic due to the spread of the mutated new coronavirus Delta strain in France.
Prevention of the epidemic becomes difficult
The WHO’s weekly outbreak report last week showed that a new study found that the average time for people infected with the Delta strain to test positive for nucleic acid from exposure to the virus was four days, compared with six days for other mutant strains. In addition, the first viral load detected in people infected with the Delta strain was more than 1200 times higher than in people infected with the original version of the New Crown strain, meaning that the Delta strain replicates faster and is more infectious in the early stages of infection.
In response to the onslaught of the Delta strain, many countries have been forced to adjust or introduce new epidemic prevention measures.
The U.S. Centers for Disease Control and Prevention said on the 28th that 66.6% of U.S. counties are at high risk of transmission of the new coronavirus and that indoor masking regulations should be reinstated immediately. The White House, for its part, has decided that all staff, whether vaccinated or not, will be required to wear masks indoors from the 28th. The CDC updated its recommendations on the 27th, saying that groups who have completed vaccination against the new strain of Coronavirus should still be required to wear masks indoors in public places in areas of high transmission, and that unvaccinated groups should wear masks indoors in public places in all areas.
French Secretary of State for European Affairs Clément Bonnet said recently that if the number of new confirmed cases continues to climb, the French government does not rule out reintroducing curfews and other measures. The Netherlands, Laos, Singapore, Malaysia and other countries have also recently announced tightened measures to prevent the epidemic.
Three of Australia’s six states have declared “city closures”, asking local residents not to go outside unless necessary. Australia’s Queensland Chief Health Officer Janet Young said some infected people have only had very brief contact with each other. “At the beginning of the new crown outbreak, 15 minutes of close contact was a concern, but now, that’s five to 10 seconds.”
covid-19 Vaccine works
The spread of the delta strain underscores the urgency of vaccination. Experts note that vaccination is still effective in preventing infection with the Delta strain, and call for an accelerated push to reduce the risk of more variant viruses.
New infections in some countries are often linked to unvaccinated cases. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said on the 25th that the new crown outbreak in the U.S. has effectively become an outbreak in unvaccinated populations. About half of the U.S. population is still not fully vaccinated, and most of the recent U.S. new crown deaths have come from unvaccinated groups.
Korean media cited domestic epidemic prevention experts as saying that one of the reasons for the rapid and widespread spread of the fourth wave of the pandemic in South Korea is the sudden increase in confirmed cases among young people who have not yet been vaccinated against the new crown. French Prime Minister Castel said on the 21st that 96% of the more than 18,000 new confirmed cases reported in the country on the 20th had not been vaccinated against the new crown.
Dr. Stephen Winchester, a consultant virologist at the Berkshire and Surrey Pathology Service in the United Kingdom, said the risk of infection could be further reduced as more people are vaccinated, thus halting the increase in cases of infection with the Delta strain.
The European Medicines Agency and the European Centre for Disease Prevention and Control also recently called on EU citizens to get vaccinated as soon as possible and as required. The European Medicines Agency said that despite the higher transmission of the Delta strain, vaccination is still the best protection at this time. In addition, some countries have announced or are considering a third booster dose of the covid-19 vaccine for some populations.