"The War Has Changed"

 The Washington Post has reported about the delta strain epidemic titled "The War has changed".

The inside information from the CDC based on the unpublished data seems to tell the following points;

1) The delta strain is more contagious as well as toxic to people than the other strains. 

2) There are non-negligible number of "the break through" cases in the fully vaccinated. The fully vaccinated people infected by this strain could infect the other innocent people. They shed as many viruses as the unvaccinated people do.

However, there are still reports against the virus load the vaccinated break through cases shed. We need carefully examine the data CDC may publish in the near future.  

https://www.medrxiv.org/content/10.1101/2021.07.28.21261086v1

3) The precautions against SARS CoV2 should be strictly kept even if you are vaccinated.  

https://www.washingtonpost.com/health/2021/07/29/cdc-mask-guidance/?fbclid=IwAR1o8a8ZCl53n-3slk7qJ2xlthpty_ODXspm9uWG29-DJTSgZZZU0QhjCV8

There have been discussions how the present mRNA vaccines could work for the delta strain. Pro et contra in the real world so far. According to some studies in vitro, such variants as the delta strain could evade immunity or lessen antibody production. 

This preprint paper says the currently available vaccine boosting induces more neutralizing antibodies but does not broaden their spectrum not like the natural infection does. 

https://www.biorxiv.org/content/10.1101/2021.07.29.454333v1

We may have to run boosting with the vaccines newly developed against new variants like the delta strain. 

We should keep it in mind the vaccines are not perfect in protection from the virus. It is mandatory for us to keep the ordinary precautions.