The strategy to overcome attack with an ultra-short incubation period and escape with an ultra-long incubation period of the COVID-19 Delta variant of based on cases of outbreaks and their containment / 上海预防医学
Shanghai Journal of Preventive Medicine
;
(12): 869-874, 2021.
Article
in Chinese
| WPRIM
| ID: wpr-887153
ABSTRACT
Objective:
To discuss the strategy of fighting and containing COVID-19.Method:
The speed of the spreading of the ordinary strain in Dalian on Dec. 15, 2021 caused by carrying cold-chain goods from a Russia-registered freighter and the Delta strain caused by imported cases in Guangzhou during May 20 to Jul. 23, 2021 was compared.Results:
The incubation period of the first generation of the imported Delta strain of COVID-19 was 4 days, which was 5 days shorter than that of the ordinary strain of COVID-19; The time from the exposure to the Delta strain to spreading to the next person was 1/3 days shorter than that of the ordinary strain of COVID-19. The inactivated vaccine needs at least 8 days for recall immune response meanwhile the mRNA vaccine needs at least 4 days, which could not completely block the COVID-19 virus, especially the Delta strain, which can attack with an ultra-short incubation period. Meanwhile, some COVID-19 strains have an incubation period longer than 14 days, which was another reason for the outbreak.Conclusion:
The time from the exposure to the COVID-19 Delta strain to spreading to the next person is 1/3 day shorter that of the ordinary strain of COIVD-19. Measures of full vaccination, physical quarantine and wearing masks in public should be taken to fight the epidemic of COVID-19, especially the Delta strain (or other variants) with an ultra-short or an ultra-long incubation period which can escape quarantine.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Shanghai Journal of Preventive Medicine
Year:
2021
Type:
Article
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