At the 2 September, 2021 daily media conference , NSW Chief Medical Officer Kerry Chant revealed either the ignorance or evil at the heart of NSW Covid policy.
When asked a question about how people who are recovering from Sars-Cov-2 would be vaccinated, Chant said this (video) [my emphasis]:
Clearly the advice is that within six weeks of an infection you are unlikely to get reinfected with Delta, but actually natural immunity to Delta or any of the viruses is less effective than actually the vaccine, in terms of providing long term immunity.
Chant Ignorant or Lying
Most of the relevant evidence suggests natural antibody immunity is larger and longer lasting that vaccine-generated immunity. Immediately after receiving the vaccine it appears there is a major spike in immunity, which is larger than naturally-acquired immunity, but it declines so quickly that natural immunity is soon more long-lasting.
This is entirely consistent with the idea that the vaccine is just a serum-sugarhit with short term benefits, as declining efficacy would suggest.
Most recently, a 27 August preprint from Maccabi University found:
SARS-CoV-2-naïve vaccinees had a 13.06-fold (95% CI, 8.08 to 21.11) increased risk for breakthrough infection with the Delta variant compared to those previously infected, when the first event (infection or vaccination) occurred during January and February of 2021.
Now, let’s examine studies showing other relevant results, courtesy of perseverant and thick-skinned journalist Alex Berenson:
Preprint, 19 August 2021, Israel and US
A paper from Israel released Sunday reported that antibody titers in people who had recovered from infection fell only 5 percent a month (titers in the vaccinated fell 40 percent a month, though from a higher baseline).
Even better, between four and nine months after infection, the percentage of people with low titers remained roughly flat, at 10 percent.
The cumulative incidence of SARS-CoV-2 infection remained almost zero among previously infected unvaccinated subjects, previously infected subjects who were vaccinated, and previously uninfected subjects who were vaccinated, compared with a steady increase in cumulative incidence among previously uninfected subjects who remained unvaccinated.
Not one of the 1359 previously infected subjects who remained unvaccinated had a SARS-CoV-2 infection over the duration of the study. [my emphasis]
Note that a followup press release softened the interpretation without changing the results.
Nature, 14 June 2021
Study of 63 people overt 12 months after infection, 41% also getting mRNA vaccines. Small numbers. Note that the authors also find vaccines increase all components of humoral (antibody) response, at least for short term.
In the absence of vaccination, antibody reactivity to the receptor binding domain (RBD) of SARS-CoV-2, neutralizing activity and the number of RBD-specific memory B cells remain relatively stable between 6 and 12 months after infection….
The data suggest that immunity in convalescent individuals will be very long lasting and that convalescent individuals who receive available mRNA vaccines will produce antibodies and memory B cells that should be protective against circulating SARS-CoV-2 variants.
Study of 254 patients up to 8 months after infection. They found “durable, broad based immune responses”. That is, lasting antibody and CD4(helper)/CD8 (killer) immune response. They identify both types as having a half-life >= 200 days.
Taken together, these results suggest that broad and effective immunity may persist long-term in recovered COVID-19 patients.
People who bother to look at data have long known large parts of these media conferences are either misrepresentations or outright lies.
We can’t see the data or research they use for health advice. We can only go by what they say. And as in this case, what they say shows them to be stupid or lying, and in either case, without an ounce of integrity.
Remember, Chant is the source of medical advice behind the tyrannical policy Berejiklian has forced on us.
2 September 2021, Video Extract from Media Conference